List of glitches (Generation II)

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This is a list of glitches that occur in the Generation II Pokémon games.

Gold, Silver, and Crystal

Battle system

Belly Drum effect

When a Pokémon uses Belly Drum, its HP is deducted by 50% and its Attack stat raised by up to 12 stages, ensuring that even the Attack stat of a Pokémon with an Attack stage of -6 can be maximized. This is accomplished through executing the command used by Swords Dance by a maximum of 6 times; however, the command is erroneously called once before verifying that HP of the user can be deducted by 50%. This means that if the user doesn't have enough HP to use the move, the Attack stat will be incorrectly boosted by 2 stages. The game will state that the attack has failed.

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


Catch rate

The status conditions of paralysis, burn, and poison increase the catch rate by 0 as opposed to by 5.

The Love Ball only gains a catch rate of 8× on Pokémon of the same gender and species as the player's Pokémon, rather than on Pokémon of the opposite gender.

The Moon Ball is supposed to multiply the catch rate by 4 on Pokémon that evolve with Moon Stone but instead does this on Pokémon that evolve with Burn Heal, as the game uses the index number that Moon Stone has in Generation I, rather than Generation II. Consequently, Moon Ball does not have any additional effect and always acts like a Poké Ball.

The Fast Ball is supposed to quadruple the catch rate against all wild Pokémon that can flee (a mechanic unique to Generation II), but only does this for three of them: Magnemite, Grimer, and Tangela.[1]

Dragon Fang effect

The Dragon Scale boosts the power of Dragon-type moves rather than the Dragon Fang.

In Pokémon Stadium 2, the Dragon Fang boosts Dragon-type moves as intended, while the Dragon Scale has no in-battle effect.

Exp. Share formula

A Pokémon with the same original Trainer as the player that is sent into battle with an Exp. Share held will gain 50% of the experience twice, which, due to rounding, may not equal 100%.

Experience amount

A Pokémon that gains an amount of experience consisting of five digits will not have the number displayed correctly. This is possible with an outsider Pokémon holding a Lucky Egg used at the Trainer House. The lowest opponent 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 is 208.

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


Experience underflow

Main article: Experience#Experience underflow glitch

Level 1 Pokémon 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).

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


HP bar animation

A Pokémon with 49 HP or more will deplete the HP bar at a slower rate than intended when taking damage. Due to an issue with the order of the code within the game, a value that would help to set a delay that was partially dependent on the maximum HP of the Pokémon, sets instead a constant delay that does not change with different HP values. This results in extra delays in the animation updating and prolongs the animation of the bar dropping.

A Pokémon with 48 HP or less is not affected as each HP is equal to one or more pixels of the HP bar, thus skipping any delay.

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


Leveling past 100

If a Pokémon is obtained at a level above 100 (101-254), it can be leveled up with 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.

Lock-On/Mind Reader oversight

When Lock-On or Mind Reader are in effect, the moves Attract, Curse, Foresight, Mean Look, Mimic, Nightmare, Spider Web and Transform cannot hit targets in the semi-invulnerable turn of Fly or Dig, and moves cannot lower stats of targets in the semi-invulnerable turn of Fly or Dig (status moves such as String Shot will fail, and additional effects of moves such as Bubble will not activate).

Menu scrolling oversight

A flag (bit 0 of memory address FFAC) in memory determines whether options can be scrolled through by holding a direction on the d-pad rather than simply pressing it, which is used by menus such as the bag. This flag is normally unset after closing the menu, and is not usually set in battle menus, meaning the player must tap through battle move menus instead of holding a direction.

Watching the staff credits after defeating Red keeps the bit set, allowing the battle options to be scrolled through. This effect is cleared however after resetting the game and reloading the save, which is probably a reason why the glitch does not work with credits triggered by entering the Hall of Fame (which resets the game afterwards).

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


Opponent Full Heal and Full Restore oversight

If an opposing Trainer uses a Full Heal to cure their Pokémon, it will not be cured of Nightmare (even after waking up from sleep) or of confusion.

If an opposing Trainer uses a Full Restore to cure their Pokémon, it will not be cured of Nightmare (even after waking up from sleep). However, it will be cured of confusion.

The Full Heal and Full Restore properly cure a Pokémon of both Nightmare and confusion if used by the player.

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


Park Ball graphics corruption

If the Park Ball is used from the Ball pocket of the player's Bag on a wild Pokémon, the game will not reload the graphics on the battle screen, causing a temporary glitch in which part of both the Bag and battle screens mix up until the Pokémon catching animation is over, at which point the game will show the battle screen being reloaded.

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


Present damage

Main article: Present (move)#Generation II

In Pokémon Gold and Silver, the move Present has a damage formula of its own. This causes the level, Attack, and Defense variables of the regular damage formula to be replaced. Thus, the move deals unusually large or small amounts of damage, depending on the Pokémon. Additionally, Present calculates type-effectiveness twice, which causes Present to only inflict a quarter of the normal damage against Rock-type and Steel-type Pokémon.

In Pokémon Crystal, both bugs were fixed for regular battles by having Present use the standard damage formula. The old formula from Gold and Silver is still used during link battles to preserve backwards compatibility. This was fixed entirely in Pokémon Stadium 2.

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


Pursuit-Revival glitch

Using a Revive, Max Revive or Rare Candy on a Pokémon that fainted from Pursuit after a switch will revive the Pokémon with the non-volatile status it had before fainting. This applies both to healing inside and outside of battle.

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


Sandstorm Spikes glitch

BoEANSprite.png This glitch is in need of research.
Reason: Is there a party position/permutation of switches or anything that causes this not to work? Do Poké Dolls work? Does party count matter? What happens exactly when the fainted team's health is later restored? Why is it "rematching trainers in the grass" may not work?
You can discuss this on the talk page.

This glitch occurs with a Pokémon in a Sandstorm which faints, when there are active Spikes against the player's Pokémon. Sending out three more Pokémon in succession which will immediately faint from the Spikes, can result in the last Pokémon surviving but with 0 HP. The player can then proceed to escape the battle (i.e. with a successful catch), and every Pokémon will remain in the party with 0 HP. White outs may not occur.

This glitch leads to other derivative sub-glitches, such as the previously known 'instant victory' effect (also used by "any%" speedrunners in the past with arbitrary code execution or bad cloning); in which entering any battle causes it to end (of the partial sort; the battle ends before the Pokémon is sent out rather than the start of the battle itself), effectively allowing the player to always win.

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


SRAM clear errors

An internal function in the code for wiping the save file known unofficially as "ClearWRAM" does not function correctly.[2] It may be worth noting, there are more specific glitches in the game, such as "Hall of Fame SRAM glitch" (box 2+ data becomes invalid, and allows the player to ultimately obtain glitch Pokémon and ????? without bad cloning, if the player clears the save file and enters the Hall of Fame without saving in between). This glitch is loosely similar to Generation I SRAM glitches related to impartial clearing, such as the "ghost Bicycle" phenomenon, "save abuse" and string names leftover from the previous save file with - (move). Another SRAM glitch is the Japanese Poké Communications Center SRAM glitch (mentioned at the header Pokémon Communication Center, though that one is related to exhausted or broken save batteries).

Stat rollover glitch

If a Pokémon's effective stat would exceed 1024, the Pokémon's stat is decreased by 1024 (for a minimum stat of 1) during damage calculation only. While most methods to increase stats cap at 999, the Thick Club, Light Ball, and Metal Powder do not.

While it is possible for this to occur for all of these items, this most readily occurs with Marowak (since Pikachu and Ditto require stat boosts to be received via Baton Pass for this to occur). If a Marowak with an Attack stat of at least 256 uses Swords Dance while holding a Thick Club, its Attack will be reduced by 1024 (minimum 1) during damage calculation only.

During damage calculation, if the attacker's (Special) Attack or the defender's (Special) Defense is higher than 255, both are temporarily divided by 4, then (regardless of whether the stats were quartered) both the attacker's (Special) Attack stat and the defender's (Special) Defense stat are taken modulo 256. Thus, stats that are greater than or equal to 1024 (256×4) will be treated incorrectly.

In Pokémon Crystal, this bug was fixed for regular battles but still occurs during link battles to preserve backwards compatibility. This was fixed entirely in Pokémon Stadium 2.

Trainer Counter/Mirror Coat damage

In Trainer battles only, if the player uses a healing item or a Poké Ball during the same turn as the opponent's Counter or Mirror Coat, their damage will be of at least 4 HP, twice the minimum standard damage for neutral moves (2 HP).

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


Transform glitches

Main article: Transform glitches

Time Capsule

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.

Other

Celebi Egg glitch

Main article: Celebi Egg glitch

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.


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.

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.

Pokémon cloning

Main article: Cloning glitches#Storage system method
Main article: Cloning glitches#Trading method

Gold and Silver

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.


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.

Coin Case

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.

Encore-Disobedience

BoEANSprite.png This glitch is in need of research.
Reason: Technical information such as the cause is wanted, spading (for example, does it only occur with transformed Pokémon?/can it disobey in every way) as well as confirmation on which versions it occurs in (as it was assumed to be Japan-only after disassembly research regarding the Japanese version).
You can discuss this on the talk page.

This glitch involves the move Encore and an outsider Pokémon. If the outsider Pokémon is locked in to a move under Encore, it may still disobey the player. While under Encore, a game freeze or glitch dimension can occur after the Pokémon disobeys the player.

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


Present text overflow

If Present is used by the player's Pokémon on a Pokémon with 8 or more characters in its name, e.g. Venusaur, and the game tries to heal the foe, but fails due to them having full HP, the “n't” will appear between the first and second lines. Result:

Enemy VENUSAUR ca
n't
receive the gift!

Trainer House

Main article: Trainer House glitches

Firebreather Dick Glitch

After battling Firebreather Dick in the Burned Tower, his sprite becomes colorless.

Crystal

Battle Tower text glitch

In v1.0 of English Pokémon Crystal (and not v1.1), a glitch causes enemy Trainers in the Battle Tower to always use the texts of female Trainers. This is due to the game attempting to use the sixth character of the Trainer's name to determine the gender.[3]

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.


Heavy Ball junk data glitch

In Crystal, the Heavy Ball's algorithm incorrectly retrieves the weights of Kadabra, Tauros, and Sunflora, causing them to become junk data that is interpreted as massive weight, giving these Pokémon +40 capture modifier.[1]

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.


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.[4]

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


Dude glitches

These two glitches can occur in normal playthrough only on Pokémon Crystal, and due to the lack of a Pokémon that can poison the player on Pokémon Gold; Pokémon Silver. Effects vary based on the language/version of the game, with the effects in Silver being more minor (in the English version it is possible to briefly see a HUD with a Level 0 male ?????, but not freeze the game) except in Korean Silver which may cause a post-battle sprite misalignment glitch without a freeze. The dude money glitch is only to occur in the German version of Pokémon Crystal.

Dude money glitch

On the German cartridge version of Crystal, the dude that presents how to catch Pokémon can be sometimes glitched for having a full PC Box (the party may also have to be filled). To do so, the player has to perform the following steps:

  1. Take the Mystery Egg as normal.
  2. Battle Silver. It doesn't matter whether the player wins or loses.
  3. Set the Pokémon Center in Cherrygrove City.
  4. Go to Route 30 to fight a Weedle. The player's Pokémon must now be poisoned. On the first turn after becoming poisoned, run away.
  5. Go to Elm's lab and deliver the Mystery Egg as normal.
  6. Make sure that the poisoned Pokémon faints inside Elm's lab, not anywhere else. Additionally the player must white out due to all fainted Pokémon.
  7. Catch Pokémon to fill a PC Box.
  8. Accept the tutorial.

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.


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.

Stadium 2

Pokémon Stadium 2 fixed the following bugs from Pokémon Gold, Silver, and Crystal:

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.

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


Multiple
generations
Transform glitchesGlitch TrainersCloning glitchesError messagesArbitrary code execution
Generation I GlitchesBattle glitchesOverworld glitches
--0 ERRORBroken hidden itemsCable Club escape glitchDual-type damage misinformation
Experience underflow glitchFight Safari Zone Pokémon trickGlitch CityItem duplication glitchItem underflow
Mew glitchOld man glitchPewter Gym skip glitchPokémon merge glitchRhydon glitchRival twins glitch
Select glitches (dokokashira door glitch, second type glitch) • Super Glitch
Time Capsule exploitWalking through wallsZZAZZ glitch
Generation II GlitchesBattle glitches
Bug-Catching Contest glitchCelebi Egg glitchCoin Case glitchesExperience underflow glitch
Glitch dimensionGlitch EggTeru-samaTime Capsule exploitTrainer House glitchesGS Ball mail glitch
Generation III GlitchesBattle glitches
Berry glitchDive glitchPomeg glitchGlitzer Popping
Generation IV GlitchesBattle glitchesOverworld glitches
Acid rainGTS glitchesPomeg glitchRage glitch
Surf glitchTweakingPal Park Retire glitch
Generation V GlitchesBattle glitchesOverworld glitches
Charge Beam additional effect chance glitchCharge move replacement glitchChoice item lock glitch
Frozen Zoroark glitchSky Drop glitch
Generation VI GlitchesBattle glitchesOverworld glitches
Charge Beam additional effect chance glitchCharge move replacement glitchChoice item lock glitch
Lumiose City save glitchSymbiosis Eject Button glitchToxic sure-hit glitch
Generation VII GlitchesBattle glitches
Charge Beam additional effect chance glitchCharge move replacement glitchChoice item lock glitch
Toxic sure-hit glitchRollout storage glitch
Generation VIII Glitches
Charge Beam additional effect chance glitchCharge move replacement glitchChoice item lock glitch
Toxic sure-hit glitchRollout storage glitchParty item offset glitch
Generation IX Glitches
Glitch effects Game freezeGlitch battleGlitch song
Gen I only: Glitch screenTMTRAINER effectInverted sprites
Gen II only: Glitch dimension
Lists Glitches (GOMystery DungeonTCG GBSpin-off)
Glitch Pokémon (Gen IGen IIGen IIIGen IVGen VGen VIGen VIIGen VIII)
Glitch moves (Gen I) • Glitch types (Gen IGen 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.