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List of natural glitches in Generation I: Difference between revisions

add experience underflow glitch
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==Pokémon Red, Green, Blue, Yellow==
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! Glitch name !! Games !! Exploit/nature
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| [[2x2 block encounter glitches]] || Pokémon Red and Blue (English, French, German) || [[Viridian Forest no encounter grass tiles glitch]]: Disable encounters.<br>[[Left-facing shore tile glitch]]: Encounter unintended Pokémon and Trainers; [[old man trick]]; [[in-game trade shore encounter trick]], [[trade link up shore encounter glitch]], [[fight Safari Zone Pokémon trick]].
| [[99 item stack glitch]] || Pokémon Red, Blue, Yellow || Data corruption: Change badges, break an exit mat, warp.
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| [[99 item stack glitch]] || Pokémon Red, and Blue (English, Japanese),<br>Yellow (Japanese) || Data corruption: Change badges, break an exit mat, warp.
| [[Activating events while facing the wrong way]] || Pokémon Red, Green, Blue, Yellow || Talking to people from the wrong side, activating a PC from the wrong side, temporarily destroying objects other than the Card Key (Red, Green, Blue JP)
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| [[Activating events while facing the wrong way]] || Pokémon Red, Green, Blue, Yellow || TalkingTalk to people from the wrong side, activatingactivate a PC from the wrong side, temporarily destroyingdestroy objects other than the Card Key (Red, Green, Blue JP)
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| [[Amazing Man]] || Pokémon Red and Blue || Unexpected NPC sprite placement.
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| [[Articuno binoculars cry glitch]] || Pokémon Red, Green, Blue (Japanese), German Blue || Articuno cry audio distortion; make Articuno's cry sound like Nidoking.
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| [[Bicycle music hole glitch]] || Pokémon Red and Blue || HavingHave the Bicycle music play while walking.
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| [[Bide fainted Pokémon damage accumulation glitch]] || Pokémon Red, Blue, Yellow || RevealA theglitch spriteinvolving offaulty aBide Pokémondamage thatprogramming used(for Flyaccumulated orBide Digdamage) early;for causewhen ana animationPokémon errorfaints. afterIt attackingcan aresult Pokémonin thata useddesync Digin witha Bidelink damagebattle.
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| [[Bide non-damaging move/action damage accumulation glitch]] || Pokémon Red, Blue, Yellow || A glitch in which Bide damage from the previous attacking move is accumulated even if a specific non-damaging move (such as Conversion) was used.
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| [[Bide sprite glitch]] || Pokémon Red, Blue, Yellow || Reveal the sprite of a Pokémon that used Fly or Dig early; cause an animation error after attacking a Pokémon that used Dig with Bide damage.
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| [[Bike Shop instant text glitch]] || Pokémon Red and Blue || Temporarily gain access to instant text until the next menu, Pokémon Center or Yes/No box.
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| [[Blaine Super Potion glitch]] || Pokémon Red and Blue || Blaine can use a Super Potion on his Pokémon even if it has full HP.
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| [[Boulder switch glitch]] || Pokémon Yellow (Japanese) v1.0, Rev A, Rev B || Having the walking Pikachu stand on any of the boulder switches in Victory Road except for the one on 1F can remove the relevant wall(s) as if the player pushed a boulder on to the switch. Fixed in "Rev 3" and the localizations.
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| [[Broken hidden items glitch]] || Pokémon Red and Green (Japanese) || Hidden items become unobtainable by the Itemfinder, or the Itemfinder detects a hidden item at the wrong place (even if it does not exist); exploit: bring a select few hidden items back by passing over a fossil.
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| [[Confusion and Substitute glitch]] || Pokémon Red, Blue, Yellow || Deal damage to another Pokémon's Substitute when a Pokémon under a Substitute hurts itself in confusion.
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| [[Counter glitches]] || Pokémon Red, Blue, Yellow || “Countering“Counter a healing item” (both the user and foe), the opponent “countering“counter your switch”, counteringcounter a selected move which wasn't used oneon one side and desyncingdesync a Link BattlBattle.
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| [[Cycling Road sign glitch]] || Pokémon Red, Blue, Yellow || Cannot read a sign due to being on the wrong map.
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| [[Disappearing NPC glitch]] || Pokémon Red, Blue, Yellow || MakingMake an NPC disappear by going to another map where they do not exist.
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| [[Dual-type damage misinformation]] || Pokémon Red, Blue, Yellow || HavingHave the game give the wrong effectiveness message for a dual-typed Pokémon.
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| [[Empty Pokémon listparty glitch]] || Pokémon Red, andGreen, GreenBlue (Japanese) || OpeningOpen the Pokémon menu with no Pokémon.
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| [[Escape sprite handling glitch]] || Pokémon Red, Green, Blue, Yellow || See the player's sprite temporarily replaced with a flipped "ABCD" square (or flipped "アイウエ" square in Japanese versions) if not playing in Super Game Boy mode after Teleport, Dig or using an Escape Rope.
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| [[Evolve without an evolutionary stone]] || Pokémon Red and Blue || Evolve Pokémon without an evolutionary stone.
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| [[Exp. All glitch]] || Pokémon Red, Blue, Yellow || An apparent discrepancy in experience gained by Pokémon with an Exp. All due to the experience being based on one Pokémon rather than all Pokémon.
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| [[FreezeExperience top move selectionunderflow glitch]] || Pokémon Red, Green, Blue, Yellow || UsingAllow the first move automatically even if it haslevel 0 PP,or obtainlevel 631 PPPokémon onto theimmediately moveshoot withup fullto PPlevel Ups applied, possibly remove a PP Up. (link battle glitch)100
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| [[Freeze top move selection glitch]] || Pokémon Red, Blue, Yellow || Use the first move automatically even if it has 0 PP, obtain 63 PP on the move with full PP Ups applied, possibly remove a PP Up. (link battle glitch)
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| [[Get stuck in a wall]] || Pokémon Red, Blue, Yellow || Become trapped in a wall and be forced to reset, have the player walk through walls when being guided, have Oak walk through the Pallet Town lady.
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| [[Ghost Bicycle glitch]] || Pokémon Red, Blue, Yellow || Prevent using the Bicycle and Surfing via a Pokémon outside of Cycling Road.
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| [[Go on Cycling Road without a Bicycle]] || Pokémon Red, Blue, Yellow || EnteringEnter Cycling Road without a Bicycle.
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| [[Go past the Marowak ghost without a Silph Scope]] || Pokémon Red, Blue, Yellow || SkippingSkip obtaining the Silph Scope in Rocket HQ (normally intended to get past the Marowak ghost).
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| [[Haze glitch]] || Pokémon Red and Blue || Cause a Pokémon thawed out from the Freeze status to still be unable to move due to a Hyper Beam recharge turn.
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| [[Hyper Beam automatic selection glitch]] || Pokémon Red, Blue, Yellow || UsingUse Hyper Beam twice in a row, obtainingobtain 63 PP on Hyper Beam with full PP Ups, removingremove a PP Up.
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| [[Hyper Beam sleep move glitch]] || Pokémon Red, Blue, Yellow || HavingHave a Pokémon that used Hyper Beam always fall asleep even if it has a status.
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| [[Infinite Blaine Door]] || Pokémon Red, Blue, Yellow || Become temporarily trapped.
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| [[Invulnerability glitch]] || Pokémon Red, Blue, Yellow || Avoid all damage except possibly from Swift, Transform, Bide(?).
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| [[Item jingle skip]] || Pokémon Red, Green, Blue (Japanese, English), Yellow (Japanese) || ObtainingObtain a Full Restore without the obtained sound effect, savingsave some slight time.
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| [[Landing on an NPC]] || Pokémon Red, Blue, Yellow || Have Red appear over an NPC.
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| [[Leech Seed and Toxic stacking]] || Pokémon Red, Blue, Yellow || Have Leech Seed's damage increase every turn like Toxic.
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| [[Left-facingLevel shortup tileTransform glitch]] || Pokémon Red and, Blue (English, French, German, Italian, Spanish only)Yellow || EncounterTemporarily unintendedgain Pokémonback andthe Trainers;original oldmoves manof trick;a fighttransformed SafariPokémon Zonethat Pokémonleveled trickup.
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| [[Level up Transform glitch]] || Pokémon Red, Blue, Yellow || Temporarily gain back the original moves of a transformed Pokémon that levelled up.
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| [[Lift Key above ball glitch]] || Pokémon Red and Blue || Stand on top of the Lift Key item ball in Rocket HQ.
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| [[Magikarp salesman glitch]] || Pokémon Red, Green, Blue (Japanese) || HavingHave 500 Pokédollars taken off you for a Magikarp but not getting the Magikarp.
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| [[Minimize and Substitute glitch]] || Pokémon Red and Blue || CausingCause sprites to change after viewing the status of a Pokémon after the opponent uses Minimize.
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| [[Mr. Fuji's house door glitch]] || Pokémon Red, Blue, Yellow || Be blocked when trying to leave Mr. Fuji's house door.
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| [[Mute Fuchsia City glitchor Cerulean City]] || Pokémon Red, Blue, Yellow || MutingMute Fucshia City or Cerulean City.
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| [[Mute the music in the Pokémon League]] || Pokémon Red, Blue, Yellow || Mute Blue's room in the Hall of Fame.
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| [[NPC and Cable Club ladybinoculars glitch]] || Pokémon Red and, Blue, Yellow || Having an NPC walk through the Cable ClubPrevent ladyNPCs andfrom intomoving theby spaceholding behinddown herA.
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| [[NPC binocularscollision glitchbypassing glitches]] || Pokémon Red, and Blue, Yellow || PreventingHave an NPC ignore NPCscollisions fromwith movingother byobjects holdingin downtheir Amovement.
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| [[NPC moonwalk glitch]] || Pokémon Red and Blue || Have an NPC walk backwards.
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| [[NPC walking behavior glitches]] || Pokémon Red and Blue || Limit an NPC's movement when it moves too far, and eventually make it completely stuck; (in Japanese versions only) trap the player against an NPC; limit an NPC's movement when it is on the right or bottom border of the screen.
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| [[Oak's Parcel prevented progress glitch]] || Pokémon Red and Green (Japanese), Pokémon Yellow (not a natural glitch) || Prevent game progress past Viridian City.
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| [[Old man full box glitch]] || Pokémon Red, Green, Blue (Japanese) || Have the old man fail to catch Weedle due to the full box message.
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| [[Partial trapping move Mirror Move link battle glitch]] || Pokémon Red and Blue || Cause Link Battle desyncronization.
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| [[Partial trapping move wrong side fainting glitch]] || Pokémon Red and Green v1.1 || Faint the user with more than 0 HP but be able to send it out again with the HP it previously had. Cause Link Battle desyncronization.
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| [[Skip Pewter Gym skip glitch]] || Pokémon Red and Blue || Continue without the first badge; [[Brock Throughthrough Wallswalls]].
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| [[Pikachu desync glitch]] || Pokémon Yellow || Force Pikachu more than one step away from the player, and not directly following the player.
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| [[PikawalkPikachu off-screen glitch]] || Pokémon Yellow || Pikachu happiness corruption; Pokémon emotion forcing; map corruption; freezing the game; NPC movement manipulation; corruption of a Trainer class and roster from the overworld; sign corruption; arbitrary code execution.
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| [[PokémonPoké cloningMart (Generationno I)items sell map corruption glitch]] || Pokémon Red, Green, Blue, Yellow (Japanese) || ObtainingTemporarily acorrupt the copytilemap of ana existingPoké PokémonMart.
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| [[Pokémon cloning (Generation I)]] || Pokémon Red, Green, Blue, Yellow || Obtain a copy of an existing Pokémon.
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| [[Pokémon switch message glitch]] || Pokémon Red, Blue, Yellow, Gold, Silver, Crystal || Have the incorrect switch message appear, provided the foe gains more HP than it lost before the user switches Pokémon.
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| [[Pokémon Tower Pokédex glitch]] || Pokémon Red, Blue, Yellow || Register a Pokémon in the Pokédex without it appearing fully.
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| [[PP restore glitch]] || Pokémon Red, Blue, Yellow || RestoringRestore PP even when PP is at its maximum (for no effect).
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| [[Professor Oak's lab leavingmusic glitch]] || Pokémon Red and Blue || MakingHave thea playersimplified, andslower Blueversion invisible,of causingProfessor temporaryOak's tilelab columnsmusic toplay appearinstead whenof openingthe theintended menumusic.
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| [[Professor Oak's lab musictilemap corruption glitch]] || Pokémon Red and Blue || HavingMake athe simplified,player slowerand versionBlue ofinvisible, Professorcausing Oak'stemporary labtile musiccolumns playto insteadappear ofwhen theopening intendedthe musicmenu.
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| [[Psychic/Psywave/Night Shade animation glitch]] || Pokémon Red, Blue, Yellow || The row of the top three pixels on the screen do not shake.
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| [[Psywave desync glitch]] || Pokémon Red, Blue, Yellow || Desynchronize a Link Battle.
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| [[Recovery move glitch]] || Pokémon Red, Blue, Yellow || Have Softboiled, Recover or Rest fail.
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| [[RedReflect/Light barScreen soundstat effectoverflow exploitglitch]] || Pokémon Red, Green, Blue, Yellow || ListeningHave a move freeze the game due to distorteda cries,Pokémon savinghaving timeexcessive bydefensive listeningstat (1024 or 1026) or deal much less damage than it is supposed to shorterfor other stats greater than cries1023.
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| [[Reflect/Light Screen division by 0]] || Pokémon Red, Blue, Yellow || Having a move freeze the game due to a Pokémon having excessive defensive stat (1024 or 1026).
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| [[Safari Zone exit glitch]] || Pokémon Red, Blue, Yellow || Access Glitch Cities
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| [[Saffron Gym glitch]] || Pokémon Red and Green (Japanese) || ObtainingObtain the Marsh Badge by losing to Sabrina.
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| [[Save A button held glitch]] || Pokémon Red, Green, Blue, Yellow || KeepingKeep the start menu up after saving for as long as the A button is held down.
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| [[Seafoam Islands glitch text boxes]] || Pokémon Red, Green, Blue (Japanese) || DisplayingDisplay glitch dialog, havinghave the game reset itself, slowingslow down menus.
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| [[See a Ghost without a Silph Scope]] || Pokémon Red, Blue, Yellow || Identify a Silph Scope ghost without the Silph Scope, but have it still act as the Silph Scope ghost.
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| [[Selfdestruct and Substitute glitch]] || Pokémon Red, Blue, Yellow || RemovingRemove a Pokémon's sprite, usinguse Selfdestruct or Explosion but not faintingfaint.
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| [[Silph Co. 11F liftabove blockedlift exitdoor glitch]] || Pokémon Red and Blue || Be blocked when trying to leave the Silph Co.'s 11F.
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| [[Silph Co. PC glitch]] || Pokémon Red and Blue || Create a Glitch City in Silph Co.
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| [[Slot machine glitch]] || || A bug that prevents intended behavior for a slot machine wheel in the Celadon Game Corner to stop advancing when a 7 appears on the first wheel or a maximum of four re-rolls is reached.
| [[Skip Pewter Gym]] || Pokémon Red and Blue || Continue without the first badge; [[Brock Through Walls]]
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| [[Special menu Select glitch]] || Pokémon Red, Green, Blue (Japanese) || Lift glitch, badge describer glitch and the memory corruptions based on this.
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| [[Statue behavior glitch]] || Pokémon Red and Blue || Surf and fish through statues.
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| [[Substitute drainingdrain movesmove not missing glitch]] || English Pokémon Red, Blue, Yellow || DrainingDrain moves Absorbon a Substitute were intended to miss and Megamiss Drainin absorbJapanese damageversions fromand Gold/Silver/Crystal, but due to a Substituteglitch may not miss in the English versions.
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| [[Substitute Mirror Move glitch]] || || -->
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| [[Substitute ¼ HP glitch]] || Pokémon Red, Blue, Yellow || Use Substitute to faint a Pokémon.
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| [[Surf down glitch]] || Pokémon Red, Blue, Yellow || Surf through an impassable tile or non-water tile
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| [[Surf from a cliff]] || Pokémon Red and Green (Japanese) || SurfingSurf from raised ground, skippingskip the Seafoam Islands boulder puzzle.
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| [[Swapping Transform moves glitch]] || Pokémon Red and Blue || Obtain “-” as the first move for CoolTrainer corruption glitches.
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| [[SwitchSwift PP underflowmiss glitch]] || Pokémon Red, Blue,and YellowGreen (JP) || Auto selecting a partial trappingThe move, obtaining 63 PP Up on a partial trapping move with full PPSwift Upsdoesn't applied,always removinghit ain PPJapanese Upversions.
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| [[Switch PP underflow glitch]] || Pokémon Red, Blue, Yellow || Auto select a partial trapping move, obtain 63 PP Up on a partial trapping move with full PP Ups applied, remove a PP Up.
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| [[List of text errors in the Pokémon games|Text errors]] || Pokémon Red, Blue, Yellow || SeeingSee unintended typos, formatting errors or localization text errors e.g. an 'evolving Raichu'.
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| [[Trade evolution moveTime Capsule glitch]] || Pokémon Red, Blue, Yellow (with a Generation II game) || ObtainingObtain glitch moves via moves a trade evolution Pokémon learns exclusive to Generation II.
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| [[Trainer Card transition screenscreens]] || Pokémon Red and Blue || HavingHave a glitchy screen show momentarily before opening the Trainer Card on a regular Game Boy (DMG mode).
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| [[Trainer escape glitch]] || Pokémon Red, Green, Blue, Yellow || Disable Start and battles, encounter unintended Pokémon and Trainers, access unintended scripts.
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| [[Transform PP restore glitch]] || Pokémon Red and Blue || HavingHave a PP restore item work as if it was restoring an original move's PP rather than the move under Transform.
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| [[Trapped in Pokémon Mansion oversight]] || Pokémon Red, Blue, Yellow || Become blocked in the Pokémon Mansion.
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| [[Trapping move and sleep glitch]] || Pokémon Red, Blue, Yellow || MakingMake it never a Pokémon's turn while it is asleep.
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| [[Vending machine purchase glitch]] || Pokémon Red, Green, Blue, Yellow || Buy a Soda Pop or Lemonade from a vending machine with less than 300 or 350 Pokédollars but more than 199 Pokédollars.
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| [[Walk around with only fainted Pokémon]] || Pokémon Red and Blue || Receive a black out easily; enter a battle and immediately lose (if black out delayed by saving and resetting or with “il” (hex:6D)).
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| [[Walk on water fromthrough SurfingSurf]] || Pokémon Red and Blue || Stand on a water tile.
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| [[Walking Pikachu happiness glitch]] || Pokémon Yellow || Increase Pikachu's happiness quickly and easily.
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|}
[[Category:Generation I glitches|*]]
[[Category:Lists]]
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