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List of glitches (Generation II): Difference between revisions

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This is a '''list of glitches''' that occur in the [[Generation II]] [[core series]] [[Pokémon games]].
This is a '''list of glitches in the [[Generation II]] [[Pokémon games]]'''. It applies to both the original [[Game Boy Color]] and the [[Nintendo 3DS|3DS]] [[Virtual Console]] releases unless otherwise noted.


==Gold and Silver==
Some glitches are found on a separate page:
'''NOTE:''' The following [[glitch]]es affect all versions of Japanese {{game|Gold and Silver|s}} (1.0 and 1.1) unless noted otherwise.
* [[List of battle glitches (Generation II)]]


===Present damage miscalculation===
==Pokémon Gold, Silver, and Crystal==
{{main|Present (move)#Generation II}}
===Celebi Egg glitch===
In {{game|Gold and Silver|s}}, the [[move]] {{m|Present}} has a damage formula of its own due to a [[glitch]]. This causes the [[level]], {{stat|Attack}}, and {{stat|Defense}} variables of the regular damage formula to be replaced. Thus, the move deals unusually large or small amounts of damage, depending on the {{OBP|Pokémon|species}}.
{{main|Celebi Egg glitch}}
 
===Day Care experience loss===
In this generation only, when a Pokémon is withdrawn from the {{pkmn|Day Care}}, its [[experience]] is rounded down to the minimum value for the current level. As a result, a Pokémon can lose experience in the Day Care.
 
For instance, a level 99 {{p|Lugia}} or {{p|Ho-Oh}} has a value between 1,212,873 and 1,249,999 experience points; once it obtains a total of 1,250,000 experience points, it will reach level 100. If a Lugia or Ho-Oh is deposited in the Day Care when it has 1,249,999 experience points (needing just 1 more point to reach level 100), but the player immediately withdraws it without walking any steps, then this Pokémon will revert to exactly 1,212,873 experience points (the minimum amount for level 99), losing 37,126 experience points in the process.
 
===Interregional Teleport quirk===
If the player travels to either [[Kanto]] or [[Johto]] in the [[S.S. Aqua]] and then {{m|teleport}}s, they will be taken to either the {{ci|Vermilion}} or {{ci|Olivine}} Pokémon Center as opposed to the last [[Pokémon Center]] they used in either [[region]]. This does not occur with the [[Magnet Train]]. If the player loses a {{pkmn|battle}} during their trip, they will be sent to their cabin instead.
 
{{YouTubeVid|Va3pzlujwE4|channel/UCjt3Dy3gFbW50L0Vl1gZWmA|name=SM|Johto|Kanto}}


This [[glitch]] was fixed in {{g|Stadium 2}} and in {{game|Crystal}}.
===Legendary beast cry distortion===
When the player checks {{p|Entei}}'s [[Pokédex]] entry, plays its [[cry]], and then immediately switches to either {{p|Suicune}}'s or {{p|Raikou}}'s entries, their cry will be distorted.


===Trainer House corruption===
When the Pokédex is sorted alphabetically, this glitch can also be applied to [[Espeon (Pokémon)|Espeon]]'s cry.
{{main|Trainer House glitch}}
{{GlitchResearch|Does it occur in the Japanese and Korean releases? [[Talk:Trainer House glitch#Real way to perform the glitch|Is it really fixed in Crystal?]]}}
This [[glitch]] affects the {{pkmn|Trainer}} in the [[Trainer House]] and is caused by corrupted {{wp|Random access memory|RAM}} for the [[Saving|save file]] in {{game|Gold and Silver|s}}.


It was fixed in {{game|Crystal}}.
===Pokémon cloning===
{{main|List of cloning glitches#Storage system move method|List of cloning glitches → Storage system move method}}
{{main|List of cloning glitches#Trading method|List of cloning glitches → Trading method}}


===Bug-Catching Contest data copy glitch===
===S.S. Aqua map glitch===
{{main|Bug-Catching Contest data copy glitch}}
[[File:S.S. Aqua map.png|thumb|right|Initial state of the Pokégear map on the S.S. Aqua, erroneously showing the player's current place as New Bark Town]]
{{GlitchResearch|Is it present in the Korean Gold/Silver?}}
If the player uses the [[Pokégear]] map while travelling on [[S.S. Aqua]], the ship appears as a small sprite at the bottom-right corner. However, the map cursor erroneously selects [[New Bark Town]] by default as the player's current place.
This [[glitch]] is exclusive to version 1.0 of the Japanese releases of {{game|Gold and Silver|s}}. When the {{player}} {{m|Fly|flies}} or {{m|teleport}}s out of the [[Bug-Catching Contest]] while it is taking place, it causes the creation of unstable {{OBP|Pokémon|species}} data.


It was fixed in version 1.1 and it does not occur in the international releases or in {{game|Crystal}}.
It is not possible to select S.S. Aqua in the map. The feature to select S.S. Aqua in the map is technically programmed in the game, but not actually available to the player.


==Crystal==
===Strain 0 Pokérus===
'''NOTE:''' The following [[glitch]]es affect all versions of English {{game|Crystal}} (1.0 and 1.1) unless noted otherwise.
{{main|Pokérus#Generation_II|Pokérus → Generation_II}}
[[Pokérus]] strain values of zero can be generated by the Pokérus generation algorithm with probability 15/255. The primary cause is an incorrectly-placed scratch register copy<ref>[https://github.com/pret/pokecrystal/blob/2fe0cbbb19df504723934f39473064033c64ef6f/engine/events/pokerus/pokerus.asm#L54 pret/pokegold: pokerus.asm line 54]</ref> which expresses when the high four bits are zero. In this case, a part of the logic is skipped, and because the bit test cleared the lower four bits and the higher bits are zero, a value of zero is copied to the scratch register, whose low bits become the strain. The day count of one is then derived from this zero as normal.


===Legendary beast Pokédex cry distortion===
Strain zero in Generation II behaves almost as normal: it is visible in the status screen, it triggers the [[Nurse Joy]] and [[Professor Elm]] dialogues, it spreads as normal, it increases [[stat experience]] gain as normal, and it is cured over time as normal. The lone abnormality is that when strain zero is cured, it does not leave the Pokémon in a post-infection state, but in a state as if it had never been infected, like if traded to a Generation I game: it can catch Pokérus again, does not block Pokérus spread, and does not have increased stat experience gain.
{{GlitchResearch|Does it also occur in Gold/Silver?}}
When the {{player}} checks {{p|Entei}}'s [[Pokédex]] entry, plays its [[cry]], and then immediately switches to either {{p|Suicune}}'s or {{p|Raikou}}'s entries, their cry will be distorted.


{{youtubevid|50Cgj1n5g1A|LunarRay}}
Additionally, if it is time for Pokérus to be cured (i.e. the time elapses to 12:00am after the final day), it is still required to close the [[Start menu]] and return to the overworld before the changes take their effects on the party.


===Overworld player sprite miscoloration===
{{YouTubeEmbed|iV6KBfUDWPM|channel/UCZz2ixp-5T6VeAPtAMQ5v5Q|name=ChickasaurusGL|Poison}}
This [[glitch]] affects the color of the {{player}}'s overworld sprite, switching it between {{ga|Ethan}}'s red and {{ga|Kris}}' blue palettes. It is caused by creating a [[Saving|save file]] as either Ethan or Kris, then overwriting it with another save file using the other player character but turning the game off while the new data is being saved. The effect disappears after saving and rebooting the game (note that the old save file will be overwritten).


{{youtubevid|fcB1LRVhX7E|zachtheglitchbuster}}
===Time Capsule glitches===
====Time Capsule exploit====
{{main|Time Capsule exploit}}


==In all Generation II games==
The [[Time Capsule exploit]] works around the programming checks put in place on the [[Time Capsule]] to prevent players from trading [[Generation II]] Pokémon to [[Generation I]] games.
'''NOTE:''' The following [[glitch]]es affect all versions of Japanese {{game|Gold and Silver|s}} (1.0 and 1.1) and of English {{game|Crystal}} (1.0 and 1.1) unless noted otherwise.


===Celebi Egg glitch===
====Trade evolution learnset====
{{main|Celebi Egg glitch}}
{{cat|Generation I Pokémon}} that [[trade evolution|evolve by trading]] can be taught [[glitch move]]s. This can be achieved by [[Trade|trading]] such {{OBP|Pokémon|species}} from a Generation I game to a Generation II game at a [[level]] where its [[Evolution|evolved]] form will learn a [[move]] not present in Generation I. Trading the Pokémon back to the Generation I game will cause the move to become a glitch move.
 
For example, trading a level 34 {{p|Graveler}} from {{game3|Red and Blue|Pokémon Red|s}} to {{game3|Gold and Silver|Pokémon Gold|s}} will cause the Graveler to evolve into {{p|Golem}}. Since it is at level 34, it will learn {{m|Rollout}} in Gold. If it is then traded back to Red, it will still have the move but the game won't recognize it properly since it is a {{cat|Generation II moves|Generation II move}}, so it will become {{m|TM05}}.
 
===Unown Egg hatching animation===
{{incomplete|section|Double-check if Unown forms other than the "A" Unown can be seen in the hatching animation}}
 
In this generation, when an {{p|Unown}} Egg hatches, the hatching animation displays the "A" Unown regardless of the actual Unown form.
 
While it is not possible to obtain an Unown Egg in normal gameplay since this Pokémon is in the {{egg|No Eggs Discovered}} [[Egg Group]], an Unown Egg is obtainable nonetheless by means such as the [[Celebi Egg glitch]].
 
==Pokémon Gold and Silver==
===All languages===
====Cerulean Gym====
This bug was carried over from {{game2|Red|Green|Blue}}. In [[Cerulean Gym]], the [[water tile]]s have [[wild Pokémon]] data programmed in, which allows players to [[Fishing|fish]] {{OBP|Pokémon|species}}. It was already corrected in {{game|Yellow}} and it was fixed again in {{game|Crystal}}. This likely happened because while Yellow came out after Red and Blue did, Red and Blue were already being used as the base of Gold and Silver due to Yellow not existing yet.
 
====Trainer House====
{{main|Trainer House glitches}}


===Coin Case glitches===
===English language===
====Coin Case glitches====
{{main|Coin Case glitches}}
{{main|Coin Case glitches}}
The Coin Case glitches are a set of glitches which occur exclusively in the English versions of {{game|Gold and Silver|s}}. They allow the player to run arbitrary code by exploiting an oversight in the process used by the game to print the text box data for the [[Coin Case]].


===Ditto assumption===
When the game is played on the [[Game Boy]] or [[Super Game Boy]] instead of the [[Game Boy Color]], the effects caused by the oversight are more limited.
In [[Generation I]] and {{gen|II}}, any {{OBP|Pokémon|species}} that uses {{m|Transform}} is regarded as a {{p|Ditto}} in its new form; this means that if the {{player}} catches a {{p|Mew}} or a [[glitch Pokémon]] which has used the move Transform or a Pokémon which has used Transform via {{m|Mirror Move}}, instead they will obtain a Ditto.


Mew turning into Ditto is not an issue because {{pkmn2|wild}} Mew cannot be legitimately encountered. With the overhaul of the mechanics in [[Generation III]], wild Mew are able to legitimately encountered. Nonetheless, the [[glitch]] is also no longer a concern because it too was fixed in Generation III.
===Japanese language===
====Bug-Catching Contest====
{{main|Bug-Catching Contest glitch}}
In the Japanese versions of {{game|Gold and Silver|s}}, if the player uses {{m|Fly}} or {{m|Teleport}} to leave the [[National Park]] during a [[Bug-Catching Contest]], the game will treat the contest as still ongoing.


===Exp. Share formula error===
This may also be used to create unstable {{OBP|Pokémon|species}} data.
A {{OBP|Pokémon|species}} with the same [[original Trainer]] as the {{player}} that is sent into {{pkmn|battle}} with an {{DL|Experience-affecting item|Exp. Share}} [[Held item|held]] will gain about 50% of the [[experience]] (due to rounding) twice, which it will not equal 100%.


===Experience underflow===
{{YouTubeVid|e4D6wJGGqZA|ChickasaurusGL|Bug}}
{{main|Experience#Experience underflow glitch}}
In [[Generation I]] and {{gen|II}}, [[level]] 1 {{OBP|Pokémon|species}} using the "medium-slow" growth algorithm will jump from level 1 to level 100 after gaining a low amount of experience points (less than 54 if the total experience is 0).


{{youtubevid|SXH8u0plHrE|TTEchidna}}
==Pokémon Crystal==
===All languages===
====Clair gift glitch====
In Crystal, if the player [[black out|whites out]] due to {{status|poison}} damage while still inside the Dragon Shrine at [[Dragon's Den]] after receiving the {{badge|Rising}}, they can return to the [[Blackthorn Gym]] to receive the reward [[TM]] from [[Clair]]. However, due to an oversight, if the player then returns to Dragon's Den and stands on the tile directly in front of the Dragon Shrine's door, Clair will appear again and give the player another {{TM|24|DragonBreath}}, as if they hadn't already received it.
{{YouTubeVid|8BvBjqxmyOk|ChickasaurusGL|Crystal}}


===Five-digit experience amount oversight===
====Pokémon meeting level glitch====
A {{OBP|Pokémon|species}} that gains an amount of experience consisting of five digits will not have the number displayed correctly. Furthermore, such scenario is only possible in the [[Trainer House]]. The lowest [[level]] required for achieving such feat is 82 for Pokémon with an experience yield of 255, and the lowest experience yield with which this is feasible with is 208. Performing the [[glitch]] also requires an [[outsider Pokémon]] with a {{DL|Experience-affecting item|Lucky Egg}}.
In {{game|Crystal}}, the level and time of day when a Pokémon was originally caught, hatched, or received is stored in the game data and can be verified by visiting the [[Poké Seer]]. However, this only works correctly for Pokémon met up to level 63.


{{youtubevid|o54VjpAEoO8|LunarRay}}
This Pokémon meeting data is condensed into a single byte, the upper two bits represent the time it was met, and the lower six bits represent the level it was met. For example, a level 70 Pokémon met in the morning will be reported as a level 6 Pokémon met in the day by the Poké Seer.


===Leveling past 100===
This glitch does not usually affect the gameplay for these reasons:
In [[Generation I]] and {{gen|II}}, if a {{OBP|Pokémon|species}} is obtained at a [[level]] above 100 (101&ndash;254), it can be leveled up with {{DL|Vitamin|Rare Candy|Rare Candies}} up to level 255. If a Rare Candy is fed to a level 255 Pokémon, its level will reset to 0. If a Pokémon above level 100 levels up due to [[experience]], its level will be reset to 100.


===Love Ball catch rate error===
* In Pokémon Crystal, there are no available Pokémon met over level 60 (other than Pokémon from [[in-game trade]]s). The [[List of wild Pokémon from in-game events#Generation II|in-game event]] {{p|Ho-Oh}} and {{p|Lugia}} are both found at this level, even though they had been available at level 40 or 70 in earlier games.
The {{DL|Poké Ball|Love Ball}} only gains a [[catch rate]] of 8&times; on {{OBP|Pokémon|species}} of the same [[gender]] and [[species]] as the {{player}}'s Pokémon, rather than on Pokémon of the opposite gender.
* Pokémon obtained from [[in-game trade]]s do not record any Pokémon meeting data. Those Pokémon are received with the same level as the player's traded Pokémon, but they are not affected by this glitch.
* The [[Generation I]] games and {{game|Gold and Silver|s}} do not record the meeting data of any Pokémon, therefore the Pokémon caught in those games are not affected by this glitch even if they are transferred to Pokémon Crystal.


===Park Ball graphics corruption===
In Pokémon Crystal, any Pokémon obtained with a high enough level from [[event Pokémon|event distributions]] had their meeting data incorrectly recorded because of this glitch. In particular, this affected the level 70 {{DL|List of PCNY event Pokémon distributions (Generation II)|Shiny Mewtwo}} received from [[Pokémon Center New York]].
If the {{DL|Poké Ball|Sport Ball|Park Ball}} is used from the Ball pocket of the {{player}}'s [[Bag]] on a [[wild Pokémon]], the game will fail to reload the graphics correctly, causing a temporary glitch in which part of both the Bag and {{pkmn|battle}} screens mix up until the Pokémon catching animation is over.
{{YouTubeVid|kcCaESMRl5Y|ChickasaurusGL|Crystal}}


{{youtubevid|v1ErZdLCIyU|Sato|bug}}
===Languages other than Japanese===
====Legendary beasts incomplete OT check====
In Crystal, when the player talks to [[Eusine]] in the [[Celadon City]] Pokémon Center he will report a rumor that {{p|Ho-Oh|a rainbow colored Pokémon}} has appeared in [[Bell Tower|Tin Tower]] (Ho-Oh) and leave the building when {{p|Suicune}}, {{p|Raikou}} or {{p|Entei}} appear in the party and/or storage boxes with OT and ID data matching that of the player. Due to a glitch, the English version of Crystal will only check the first five characters of the player's name. For example, if the player's name was “CRYSTAL”, then having the [[legendary beasts]] with the OT name “CRYST” and a matching ID of the player will enable the event. This is due to the player names in the original Japanese version being a maximum of five characters long and the English version failing to account for the change.
{{YouTubeVid|GVTTmReM4nQ|ChickasaurusGL|Crystal}}


===Pokémon Storage System cloning===
===Japanese language===
{{main|Cloning glitches#Storage system method}}
====Pokémon Communication Center====
In the Japanese version of {{game|Crystal}}, address $A800 in SRAM triggers a script in the [[Pokémon Communication Center]] that may be arbitrarily set to values other than 0x00 when the game does not currently have a [[Save|save file]]; otherwise, its value is correctly set to 0x00. This causes all sort of bugs, like crashes, freezes, and other random behavior.


===Sketch glitches===
While the purpose of this script is not known, it appears to be related to the [[Mobile System GB]]. In the localizations, although the related code is unused, this issue was fixed by adding a check that looks up the value of address $A800 and automatically resets it to 0x00.<ref>[https://github.com/kanzure/pokecrystal/blob/master/misc/mobile_45.asm#L23968 pokecrystal/mobile_45.asm at master · kanzure/pokecrystal · GitHub]</ref>
{{main|Sketch glitch}}
{{YouTubeVid|nqEaRpDEeTw|ChickasaurusGL|Crystal}}


===Thick Club effect error===
===German language===
If a {{p|Marowak}} with a {{stat|Attack}} stat equal or higher than 256 uses {{m|Swords Dance}} while holding a {{DL|Stat-enhancing item|Thick Club}}, its Attack will be reduced by 1024 (minimum 1) during [[damage]] calculation only. This happens as a consequence of an oversight that causes the temporal Attack boost from {{DL|Stat-enhancing item|Thick Club}} to ignore the [[stat]] cap of 999 unlike other stat modifiers. During damage calculation, both the attacker's (Special) Attack stat and the defender's (Special) Defense stat are modded by 256, and, prior to that, if either is higher than 255, both are temporarily divided by 4. Thus, stats that are equal or higher than 1024 (256x4) will be treated wrongly.
====Dude freezing glitch====
On the Virtual Console release of German Crystal, if the player has full boxes while the dude wants to present how to catch Pokémon, the game will [[Game freeze|freeze]]. Other languages of Crystal freeze or reset the game with the 'Game Boy Color only' message in different ways.


This [[glitch]] was fixed in {{g|Stadium 2}} and in {{g|Crystal}}. However, Pokemon Crystal still performs the glitch during Link battles, presumably in order to prevent inconsistencies during battles between Pokemon Crystal and Pokemon Gold or Silver.
====Dude money glitch====
On the German cartridge version of Crystal, when doing the Dude glitch, trying to use the [[Poké Ball]] shows:


===Trade cloning===
{{sign|RBY|header}}
{{main|Cloning glitches#Trading method}}
{{sign|RBY|Die POKéMON-BOX}}
{{sign|RBY|ist voll. Das}}
{{sign|RBY|kannst du jetzt}}
{{sign|RBY|nicht benutzen.}}
{{sign|RBY|footer}}


<!--==Stadium 2==
This message also glitches the left side of the screen. Another message is shown:
===Infinite Continues glitch===
This is a glitch that can be performed in {{g|Stadium 2}} with any [[Stadium Cup]]. If there is a previously suspended game and the {{player}} is playing the Stadium Cup, suspending the game after a loss causes a warning message to pop up, informing the player that there is already a suspended game. If the "Continue without Suspending" option is selected, a rematch with the opponent who just defeated the player will be triggered, but no Continue will be used.


This [[glitch]] does not occur in {{eng|Pokémon Stadium}}.
{{sign|RBY|header}}
{{sign|RBY|KUMPEL hebt}}
{{sign|RBY|{{PDollar}}{{tt|######|This value varies}} auf!}}
{{sign|RBY|footer}}


(The Stadium games aren't core series, afaik.)-->
If the tutorial is accepted again, the player is left with {{PDollar}}999999.
==Glitches involving communication with the Generation I games==
{{YouTubeVid|A8zaTOkjKS4|ChickasaurusGL|Crystal}}
===Johto guard bypassing===
{{main|Johto guard glitch}}


===Shiny Ditto DV manipulation===
==Pokémon Stadium 2==
The Shiny Ditto glitch requires a game from both [[Generation I]] and {{gen|II}} but it only has an effect on a Generation II game. In Generation I, if a {{OBP|Pokémon|species}} uses the [[move]] {{m|Transform}} while already transformed, it will retain the {{IV|DV}}s of the Pokémon it transformed into after being {{pkmn2|caught}}. Due to {{Shiny|Shininess}} being determined by DVs in Generation II, this allows the {{player}} to make a {{pkmn2|wild}} Ditto Shiny by having it use Transform while already transformed; accomplishing this is possible by either having a Shiny Pokémon that knows Transform ({{p|Mew}}, certain [[glitch Pokémon]], or another Ditto) or by teaching a Shiny Pokémon the move {{m|Mimic}}, then having the wild Ditto use Mimic on the move Transform. The end result is that the Ditto will be Shiny in the Generation II game.
===All languages===
====Depositing a held Key Item====
If a Pokémon is holding a Key Item in the Generation II (such as by using the [[Celebi Egg glitch]]), this item can be deposited normally in the Metal Case from the {{OBP|PC|Stadium}} in Pokémon Stadium 2 and then transferred to another Generation II game.


{{youtubevid|8Lb5pq0y6h8|v0id19}}
For instance, this can be used to transfer a [[Squirt Bottle]] between Generation II games for the purpose of [[sequence breaking]].


===Trade evolution learnset oversight===
====Infinite continues====
{{cat|Generation I Pokémon}} that {{DL|Methods of evolution|Evolution via trading|evolve by trading}} can be taught {{DL|List of glitch moves|glitch moves}} through this [[glitch]]. This can be achieved by [[Trade|trading]] such {{OBP|Pokémon|species}} from a Generation I game to a Generation II game at a [[level]] where its [[Evolution|evolved]] form will learn a [[move]] not present in Generation I. Trading the Pokémon back to the Generation I game will cause the move to become a glitch move.
This occurs with any [[Stadium Cup]]. If there is a previously suspended game and the player is playing a Stadium Cup, suspending the game after a loss causes a warning message to pop up, telling the player that there is already a suspended game. If "Continue without Suspending" is selected, a rematch with the opponent who just defeated the player will be triggered, but no continue will be used.
 
===Languages other than Japanese===
====Pokédex data localization====
Due to a localization oversight, using the [[Transfer Pak]] with the English versions of {{g|Stadium 2}} and {{game|Red and Blue|s|Pokémon Blue}} and looking up the locations of [[wild Pokémon]] in the [[Pokédex]] will instead load the corresponding data for the [[Pokémon Blue Version (Japanese)|Japanese version]].
 
{{YouTubeVid|zPehggPTpzw|ChickasaurusGL|Johto|Kanto}}
 
==References==
{{reflist}}


For example, trading a level 34 {{p|Graveler}} from {{game3|Red and Blue|Pokémon Red|s}} to {{game3|Gold and Silver|Pokémon Gold|s}} will cause the Graveler to evolve into {{p|Golem}}. Since it is at level 34, it will learn {{m|Rollout}} in Gold. If it is then traded back to Red, it will still have the move but the game won't recognize it properly since it is a {{cat|Generation II moves|Generation II move}}, so it will become {{m|TM05}}.
{{-}}
{{Glitches}}<br>
{{Glitches}}<br>
{{Project GlitchDex notice}}
{{Project GlitchDex notice}}


[[Category:Glitches by game]]
[[Category:Glitches by game]]
[[Category:Lists]]


[[de:Bugs in der zweiten Generation]]
[[de:Bugs in der zweiten Generation]]
[[es:Lista de glitches de la segunda generación]]
[[fr:Liste des bugs de la deuxième génération]]
[[it:Elenco glitch in seconda generazione]]
[[zh:游戏漏洞（第二世代）]]
[[zh:游戏漏洞（第二世代）]]

Latest revision as of 10:49, 24 April 2024

This is a list of glitches in the Generation II Pokémon games. It applies to both the original Game Boy Color and the 3DS Virtual Console releases unless otherwise noted.

Some glitches are found on a separate page:

Pokémon Gold, Silver, and Crystal

Celebi Egg glitch

Main article: Celebi Egg glitch

Day Care experience loss

In this generation only, when a Pokémon is withdrawn from the Day Care, its experience is rounded down to the minimum value for the current level. As a result, a Pokémon can lose experience in the Day Care.

For instance, a level 99 Lugia or Ho-Oh has a value between 1,212,873 and 1,249,999 experience points; once it obtains a total of 1,250,000 experience points, it will reach level 100. If a Lugia or Ho-Oh is deposited in the Day Care when it has 1,249,999 experience points (needing just 1 more point to reach level 100), but the player immediately withdraws it without walking any steps, then this Pokémon will revert to exactly 1,212,873 experience points (the minimum amount for level 99), losing 37,126 experience points in the process.

Interregional Teleport quirk

If the player travels to either Kanto or Johto in the S.S. Aqua and then teleports, they will be taken to either the Vermilion or Olivine Pokémon Center as opposed to the last Pokémon Center they used in either region. This does not occur with the Magnet Train. If the player loses a battle during their trip, they will be sent to their cabin instead.

By SM
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


Legendary beast cry distortion

When the player checks Entei's Pokédex entry, plays its cry, and then immediately switches to either Suicune's or Raikou's entries, their cry will be distorted.

When the Pokédex is sorted alphabetically, this glitch can also be applied to Espeon's cry.

Pokémon cloning

Main article: List of cloning glitches → Storage system move method
Main article: List of cloning glitches → Trading method

S.S. Aqua map glitch

Initial state of the Pokégear map on the S.S. Aqua, erroneously showing the player's current place as New Bark Town

If the player uses the Pokégear map while travelling on S.S. Aqua, the ship appears as a small sprite at the bottom-right corner. However, the map cursor erroneously selects New Bark Town by default as the player's current place.

It is not possible to select S.S. Aqua in the map. The feature to select S.S. Aqua in the map is technically programmed in the game, but not actually available to the player.

Strain 0 Pokérus

Main article: Pokérus → Generation_II

Pokérus strain values of zero can be generated by the Pokérus generation algorithm with probability 15/255. The primary cause is an incorrectly-placed scratch register copy[1] which expresses when the high four bits are zero. In this case, a part of the logic is skipped, and because the bit test cleared the lower four bits and the higher bits are zero, a value of zero is copied to the scratch register, whose low bits become the strain. The day count of one is then derived from this zero as normal.

Strain zero in Generation II behaves almost as normal: it is visible in the status screen, it triggers the Nurse Joy and Professor Elm dialogues, it spreads as normal, it increases stat experience gain as normal, and it is cured over time as normal. The lone abnormality is that when strain zero is cured, it does not leave the Pokémon in a post-infection state, but in a state as if it had never been infected, like if traded to a Generation I game: it can catch Pokérus again, does not block Pokérus spread, and does not have increased stat experience gain.

Additionally, if it is time for Pokérus to be cured (i.e. the time elapses to 12:00am after the final day), it is still required to close the Start menu and return to the overworld before the changes take their effects on the party.


By ChickasaurusGL


Time Capsule glitches

Time Capsule exploit

Main article: Time Capsule exploit

The Time Capsule exploit works around the programming checks put in place on the Time Capsule to prevent players from trading Generation II Pokémon to Generation I games.

Trade evolution learnset

Generation I Pokémon that evolve by trading can be taught glitch moves. This can be achieved by trading such Pokémon from a Generation I game to a Generation II game at a level where its evolved form will learn a move not present in Generation I. Trading the Pokémon back to the Generation I game will cause the move to become a glitch move.

For example, trading a level 34 Graveler from Pokémon Red to Pokémon Gold will cause the Graveler to evolve into Golem. Since it is at level 34, it will learn Rollout in Gold. If it is then traded back to Red, it will still have the move but the game won't recognize it properly since it is a Generation II move, so it will become TM05.

Unown Egg hatching animation

050Diglett.png This section is incomplete.
Please feel free to edit this section to add missing information and complete it.
Reason: Double-check if Unown forms other than the "A" Unown can be seen in the hatching animation

In this generation, when an Unown Egg hatches, the hatching animation displays the "A" Unown regardless of the actual Unown form.

While it is not possible to obtain an Unown Egg in normal gameplay since this Pokémon is in the No Eggs Discovered Egg Group, an Unown Egg is obtainable nonetheless by means such as the Celebi Egg glitch.

Pokémon Gold and Silver

All languages

Cerulean Gym

This bug was carried over from Pokémon Red, Green, and Blue. In Cerulean Gym, the water tiles have wild Pokémon data programmed in, which allows players to fish Pokémon. It was already corrected in Pokémon Yellow and it was fixed again in Pokémon Crystal. This likely happened because while Yellow came out after Red and Blue did, Red and Blue were already being used as the base of Gold and Silver due to Yellow not existing yet.

Trainer House

Main article: Trainer House glitches

English language

Coin Case glitches

Main article: Coin Case glitches

The Coin Case glitches are a set of glitches which occur exclusively in the English versions of Pokémon Gold and Silver. They allow the player to run arbitrary code by exploiting an oversight in the process used by the game to print the text box data for the Coin Case.

When the game is played on the Game Boy or Super Game Boy instead of the Game Boy Color, the effects caused by the oversight are more limited.

Japanese language

Bug-Catching Contest

Main article: Bug-Catching Contest glitch

In the Japanese versions of Pokémon Gold and Silver, if the player uses Fly or Teleport to leave the National Park during a Bug-Catching Contest, the game will treat the contest as still ongoing.

This may also be used to create unstable Pokémon data.

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


Pokémon Crystal

All languages

Clair gift glitch

In Crystal, if the player whites out due to poison damage while still inside the Dragon Shrine at Dragon's Den after receiving the Rising Badge, they can return to the Blackthorn Gym to receive the reward TM from Clair. However, due to an oversight, if the player then returns to Dragon's Den and stands on the tile directly in front of the Dragon Shrine's door, Clair will appear again and give the player another TM24 (DragonBreath), as if they hadn't already received it.

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


Pokémon meeting level glitch

In Pokémon Crystal, the level and time of day when a Pokémon was originally caught, hatched, or received is stored in the game data and can be verified by visiting the Poké Seer. However, this only works correctly for Pokémon met up to level 63.

This Pokémon meeting data is condensed into a single byte, the upper two bits represent the time it was met, and the lower six bits represent the level it was met. For example, a level 70 Pokémon met in the morning will be reported as a level 6 Pokémon met in the day by the Poké Seer.

This glitch does not usually affect the gameplay for these reasons:

  • In Pokémon Crystal, there are no available Pokémon met over level 60 (other than Pokémon from in-game trades). The in-game event Ho-Oh and Lugia are both found at this level, even though they had been available at level 40 or 70 in earlier games.
  • Pokémon obtained from in-game trades do not record any Pokémon meeting data. Those Pokémon are received with the same level as the player's traded Pokémon, but they are not affected by this glitch.
  • The Generation I games and Pokémon Gold and Silver do not record the meeting data of any Pokémon, therefore the Pokémon caught in those games are not affected by this glitch even if they are transferred to Pokémon Crystal.

In Pokémon Crystal, any Pokémon obtained with a high enough level from event distributions had their meeting data incorrectly recorded because of this glitch. In particular, this affected the level 70 Shiny Mewtwo received from Pokémon Center New York.

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


Languages other than Japanese

Legendary beasts incomplete OT check

In Crystal, when the player talks to Eusine in the Celadon City Pokémon Center he will report a rumor that a rainbow colored Pokémon has appeared in Tin Tower (Ho-Oh) and leave the building when Suicune, Raikou or Entei appear in the party and/or storage boxes with OT and ID data matching that of the player. Due to a glitch, the English version of Crystal will only check the first five characters of the player's name. For example, if the player's name was “CRYSTAL”, then having the legendary beasts with the OT name “CRYST” and a matching ID of the player will enable the event. This is due to the player names in the original Japanese version being a maximum of five characters long and the English version failing to account for the change.

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


Japanese language

Pokémon Communication Center

In the Japanese version of Pokémon Crystal, address $A800 in SRAM triggers a script in the Pokémon Communication Center that may be arbitrarily set to values other than 0x00 when the game does not currently have a save file; otherwise, its value is correctly set to 0x00. This causes all sort of bugs, like crashes, freezes, and other random behavior.

While the purpose of this script is not known, it appears to be related to the Mobile System GB. In the localizations, although the related code is unused, this issue was fixed by adding a check that looks up the value of address $A800 and automatically resets it to 0x00.[2]

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


German language

Dude freezing glitch

On the Virtual Console release of German Crystal, if the player has full boxes while the dude wants to present how to catch Pokémon, the game will freeze. Other languages of Crystal freeze or reset the game with the 'Game Boy Color only' message in different ways.

Dude money glitch

On the German cartridge version of Crystal, when doing the Dude glitch, trying to use the Poké Ball shows:

Die POKéMON-BOX
ist voll. Das
kannst du jetzt
nicht benutzen.

This message also glitches the left side of the screen. Another message is shown:

KUMPEL hebt
$###### auf!

If the tutorial is accepted again, the player is left with $999999.

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


Pokémon Stadium 2

All languages

Depositing a held Key Item

If a Pokémon is holding a Key Item in the Generation II (such as by using the Celebi Egg glitch), this item can be deposited normally in the Metal Case from the PC in Pokémon Stadium 2 and then transferred to another Generation II game.

For instance, this can be used to transfer a Squirt Bottle between Generation II games for the purpose of sequence breaking.

Infinite continues

This occurs with any Stadium Cup. If there is a previously suspended game and the player is playing a Stadium Cup, suspending the game after a loss causes a warning message to pop up, telling the player that there is already a suspended game. If "Continue without Suspending" is selected, a rematch with the opponent who just defeated the player will be triggered, but no continue will be used.

Languages other than Japanese

Pokédex data localization

Due to a localization oversight, using the Transfer Pak with the English versions of Pokémon Stadium 2 and Pokémon Blue and looking up the locations of wild Pokémon in the Pokédex will instead load the corresponding data for the Japanese version.

By ChickasaurusGL
This video is not available on Bulbapedia; instead, you can watch the video on YouTube here.


References

  1. ↑ pret/pokegold: pokerus.asm line 54
  2. ↑ pokecrystal/mobile_45.asm at master · kanzure/pokecrystal · GitHub


Multiple
generations 		Transform glitches • Glitch Trainers • Cloning glitches • Error messages • Arbitrary code execution
Generation I Glitches • Battle glitches • Overworld glitches
-- • 0 ERROR • Broken hidden items • Cable Club escape glitch • Dual-type damage misinformation
Experience underflow glitch • Fight Safari Zone Pokémon trick • Glitch City • Item duplication glitch • Item underflow
Mew glitch • Old man glitch • Pewter Gym skip glitch • Pokémon merge glitch • Rhydon glitch • Rival twins glitch
Select glitches (dokokashira door glitch, second type glitch) • Super Glitch
Time Capsule exploit • Walking through walls • ZZAZZ glitch
Generation II Glitches • Battle glitches
Bug-Catching Contest glitch • Celebi Egg glitch • Coin Case glitches • Experience underflow glitch
Glitch dimension • Glitch Egg • Teru-sama • Time Capsule exploit • Trainer House glitches • GS Ball mail glitch
Generation III Glitches • Battle glitches
Berry glitch • Dive glitch • Pomeg glitch • Glitzer Popping
Generation IV Glitches • Battle glitches • Overworld glitches
Acid rain • GTS glitches • Pomeg glitch • Rage glitch
Surf glitch • Tweaking • Pal Park Retire glitch
Generation V Glitches • Battle glitches • Overworld glitches
Charge Beam additional effect chance glitch • Charge move replacement glitch • Choice item lock glitch
Frozen Zoroark glitch • Sky Drop glitch
Generation VI Glitches • Battle glitches • Overworld glitches
Charge Beam additional effect chance glitch • Charge move replacement glitch • Choice item lock glitch
Lumiose City save glitch • Symbiosis Eject Button glitch • Toxic sure-hit glitch
Generation VII Glitches • Battle glitches
Charge Beam additional effect chance glitch • Charge move replacement glitch • Choice item lock glitch
Toxic sure-hit glitch • Rollout storage glitch
Generation VIII Glitches
Charge Beam additional effect chance glitch • Charge move replacement glitch • Choice item lock glitch
Toxic sure-hit glitch • Rollout storage glitch • Party item offset glitch
Generation IX Glitches
Glitch effects Game freeze • Glitch battle • Glitch song
Gen I only: Glitch screen • TMTRAINER effect • Inverted sprite
Gen II only: Glitch dimension
Lists Glitches (GO • Mystery Dungeon • TCG GB • Spin-off)
Glitch Pokémon (Gen I • Gen II • Gen III • Gen IV • Gen V • Gen VI • Gen VII • Gen VIII)
Glitch moves (Gen I) • Glitch types (Gen I • Gen II)


Project GlitchDex logo.png This glitch Pokémon article is part of Project GlitchDex, a Bulbapedia project that aims to write comprehensive articles on glitches in the Pokémon games.
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