Time Capsule exploit

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The Johto guard glitch is a glitch in Gold, Silver, and Crystal which allows players to trade a Generation II Pokémon into a Generation I game as an equivalent glitch Pokémon or Generation I Pokémon by using a ????? (index number 255).

A ????? (index number 255) can be obtained by using the Celebi Egg glitch and having the Pokémon Day Care on Route 34 raise an obtained ????? (index number 000) 'bad clone'. After withdrawing it, the ????? (index number 000) 'reverts' back into a ????? (index number 255).

Hiding Generation II Pokémon

This glitch takes advantage of ????? (index number 255)'s 'cloaking' abilities. If the ????? (index number 255) is switched above a Generation II Pokémon, it is possible to bring Generation II Pokémon into the Time Capsule, as long as each Generation II Pokémon in the party is hidden below the ????? because Pokémon below it are temporarily regarded as being of index number 000 and ????? (index number 000) is not considered as a Generation II Pokémon by the game. As such, Pokémon below the ????? (index number 255) will be regarded as an 'M in Red and Blue, or a 3TrainerPoké in Pokémon Yellow.

However, the game will still block the Pokémon if it has any moves which originated from Generation II even if ????? (index number 255) is above it, so any moves which originated from Generation II must still be removed by the Move Deleter if they are known by a Pokémon to be hidden by the ????? (index number 255).

Applications

The glitch is useful for obtaining glitch Pokémon, and can be used to obtain almost any glitch Pokémon in Generation I, including glitch Pokémon previously unobtainable via the Ditto glitch and old man glitch because of a procedure where an equivalent Trainer class is fought if glitch Pokémon with index numbers of 200 and above are battled in the wild.

Reverting 'M/3TrainerPoké into an equivalent species

If the ????? (index number 255) is switched back underneath the Generation II Pokémon after entering the Time Capsule, its original species is restored, meaning that Generation II Pokémon can be taken into the Time Capsule.

If the Pokémon is traded as an 'M or 3TrainerPoké, it is actually an unstable hybrid of 'M or 3TrainerPoké and the actual glitch Pokémon, with the actual Pokémon as the recipient and the 'M or 3TrainerPoké as the donor. To stabilize an unstable hybrid Pokémon, a Pokémon can be evolved (in the way the recipient would), traded to Pokémon Stadium 2, or deposited and withdrawn from Pokémon Day Care. A stabilized hybrid will be the species and level of the recipient Pokémon (or its evolved form if it was evolved), but have the stats, nickname, and moves of the donor. Once stabilized, the Pokémon can be traded to the Generation II games.

Since Generation II Pokémon do not exist in Generation I, the received Generation I Pokémon is determined by a conversion table for index numbers 1-250 which is hard-coded into the ROM of Gold, Silver, and Crystal. It is currently unknown what determines the equivalent Pokémon in Generation I for a Generation II Pokémon with index numbers 000 and 251-255 because the equivalent Generation I Pokémon is no longer consistent on the species for these Pokémon.

Conversion

Generation II Generation I
Hex Pokémon Hex PokémonWrong template. See Template:Sup/doc. PokémonWrong template. See Template:Sup/doc.
98 Chikorita BF ▶ A 4 4
99 Bayleef C0 a 44Hy
9A Meganium C1 ゥ (C1) ♀ .
9B Cyndaquil C2 ゥ .4 PPKMNp' '
9C Quilava C3 h POKé ゥ ( Z4
9D Typhlosion C4 PokéWTrainer X ゥ- xゥ,
9E Totodile C5 PkMn (C5) 4. .
9F Croconaw C6 LM4 7g
A0 Feraligatr C7 ♀Pゥ ゥゥT u
A1 Sentret C8 ゥU? g g
A2 Furret C9 8 (C9) gJ1
A3 Hoothoot CA PC4SH Glitch (CA)
A4 Noctowl CB p . pゥ
A5 Ledyba CC PkMn ◣ n .8
A6 Ledian CD Trainer ゥ. B
A7 Spinarak CE ▼ W G d PkMn (CE)
A8 Ariados CF OPkMn4X 4, ゥァ (CF)
A9 Crobat D0 Missingno.
(Normal form)
Glitch (D0)
AA Chinchou D1 4B 8 4 8 B (D1)
AB Lanturn D2 ゥ ' PkMn (D2)
AC Pichu D3 M p'u ゥ ゥゥ)
AD Cleffa D4 Aゥ G ゥ (D4)
AE Igglybuff D5 Pゥ ゥ ゥ 'ゥ.
AF Togepi D6 4h PkMn pゥぁ ゥぇ (D6)
B0 Togetic D7 Glitch (D7) PkMnp (D7)
B1 Natu D8 PkMnaPkMnゥ ♂ fPkMnk PkMn (D8)
B2 Xatu D9 PkMnRPkMn " ゥ (D9)
B3 Mareep DA B (DA) ]
B4 Flaaffy DB Glitch (DB) ゥ' B
B5 Ampharos DC Glitch (DC) PkMn (DC)
B6 Bellossom DD 7PkMn 'v 4, ゥァ (DD)
B7 Marill DE -PkMn 8 (DE)
B8 Azumarill DF .PkMn p ID
B9 Sudowoodo E0 /PkMn ▼PkMn 8 P ァ
BA Politoed E1 'v 'r 'r 4
BB Hoppip E2 …… (h4to89
BC Skiploom E3 ゥ (E3) 4HI 89 4to
BD Jumpluff E4 Glitch (E4) 8B 4 8
BE Aipom E5 C Z ゥ
BF Sunkern E6 - - 9
C0 Sunflora E7 Pゥ 4$ ゥHIゥ.
C1 Yanma E8 X:LC 4(h4hi?$
C2 Wooper E9 c 4HI?
C3 Quagsire EA A (EA) 'r ゥ
C4 Espeon EB Glitch (EB) $ Pゥ. 4(
C5 Umbreon EC Glitch (EC) ?/
C6 Murkrow ED hゥ 4(h4?
C7 Slowking EE .g ゥ► ゥ▼ ゥ
C8 Misdreavus EF ゥ$'M h 4Pゥ ゥ...
C9 Unown F0 ゥ$ (F0) . ゥ ( .I' .
CA Wobbuffet F1 94 ' B' ゥ
CB Girafarig F2 ゥ l (F2) ゥ ゥェ ゥ ▷
CC Pineco F3 ゥ l (F3) ゥ $ A
CD Forretress F4 ゥ$ (F4) ♂ p ゥ
CE Dunsparce F5 Glitch (F5) | _|p u
CF Gligar F6 G'Mp ゥ $ A (F6)
D0 Steelix F7 'Ng'Mp PkMn (F7)
D1 Snubbull F8 'Ng ゥ$ ゥ 4ぁ 4
D2 Granbull F9 94 h $
D3 Qwilfish FA Glitch (FA) ゥ▾ ゥ♂
D4 Scizor 1F Missingno.
(Normal form)
Missingno.
(Yellow form)
D5 Shuckle 20 Missingno.
(Normal form)
Missingno.
(Yellow form)
D6 Heracross 32 Missingno.
(Normal form)
Missingno.
(Yellow form)
D7 Sneasel 38 Missingno.
(Normal form)
Missingno.
(Yellow form)
D8 Teddiursa 3D Missingno.
(Normal form)
Missingno.
(Yellow form)
D9 Ursaring 3E Missingno.
(Normal form)
Missingno.
(Yellow form)
DA Slugma 3F Missingno.
(Normal form)
Missingno.
(Yellow form)
DB Magcargo 43 Missingno.
(Normal form)
Missingno.
(Yellow form)
DC Swinub 44 Missingno.
(Normal form)
Missingno.
(Yellow form)
DD Piloswine 45 Missingno.
(Normal form)
Missingno.
(Yellow form)
DE Corsola 4F Missingno.
(Normal form)
Missingno.
(Yellow form)
DF Remoraid 50 Missingno.
(Normal form)
Missingno.
(Yellow form)
E0 Octillery 51 Missingno.
(Normal form)
Missingno.
(Yellow form)
E1 Delibird 56 Missingno.
(Normal form)
Missingno.
(Yellow form)
E2 Mantine 57 Missingno.
(Normal form)
Missingno.
(Yellow form)
E3 Skarmory 5E Missingno.
(Normal form)
Missingno.
(Yellow form)
E4 Houndour 5F Missingno.
(Normal form)
Missingno.
(Yellow form)
E5 Houndoom 73 Missingno.
(Normal form)
Missingno.
(Yellow form)
E6 Kingdra 79 Missingno.
(Normal form)
Missingno.
(Yellow form)
E7 Phanpy 7A Missingno.
(Normal form)
Missingno.
(Yellow form)
E8 Donphan 7F Missingno.
(Normal form)
Missingno.
(Yellow form)
E9 Porygon2 86 Missingno.
(Normal form)
Missingno.
(Yellow form)
EA Stantler 87 Missingno.
(Normal form)
Missingno.
(Yellow form)
EB Smeargle 89 Missingno.
(Normal form)
Missingno.
(Yellow form)
EC Tyrogue 8C Missingno.
(Normal form)
Missingno.
(Yellow form)
ED Hitmontop 92 Missingno.
(Normal form)
Missingno.
(Yellow form)
EE Smoochum 9C Missingno.
(Normal form)
Missingno.
(Yellow form)
EF Elekid 9F Missingno.
(Normal form)
Missingno.
(Yellow form)
F0 Magby A0 Missingno.
(Normal form)
Missingno.
(Yellow form)
F1 Miltank A1 Missingno.
(Normal form)
Missingno.
(Yellow form)
F2 Blissey A2 Missingno.
(Normal form)
Missingno.
(Yellow form)
F2 Blissey A2 Missingno.
(Normal form)
Missingno.
(Yellow form)
F3 Raikou AC Missingno.
(Normal form)
Missingno.
(Yellow form)
F4 Entei AE Missingno.
(Normal form)
Missingno.
(Yellow form)
F5 Suicune AF Missingno.
(Normal form)
Missingno.
(Yellow form)
F6 Larvitar B5 Missingno.
(Normal form)
Missingno.
(Yellow form)
F7 Pupitar B6 Missingno.
(Kabutops form)
Missingno.
(Yellow form)
F8 Tyranitar B7 Missingno.
(Aerodactyl Fossil form)
Missingno.
(Yellow form)
F9 Lugia B8 Missingno.
(Ghost form)
Missingno.
(Yellow form)
FA Ho-Oh 34 Missingno.
(Normal form)
Missingno.
(Yellow form)

Video

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


History

Before a method was found of obtaining a ????? (index number 255) without cheating, the idea of using a ????? to bypass a Generation II Pokémon in to the Time Capsule was proposed on TRsRockin's forums, but was never fully investigated until Paco81's discovery of the Celebi Egg glitch on Glitch City Laboratories.


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 glitchesOverworld 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 sprite
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)


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