Swift miss glitch

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Miscellaneous glitches of Pokémon Red and Blue and Pokémon Yellow

Amazing Man (Red and Blue only) | Cable Club escape glitch | Celadon looping map trick | Champion Blue music muting glitch | Coastal Flooding | Confusion and Substitute glitch | Cooltrainer move | Cycling based glitch maps | Escape sprite handling glitch | Evolve without an evolutionary stone (Red and Blue only) | Evolving Raichu (Red and Blue only) | Expanded item pack | Expanded Pokédex | Focus Energy glitch | Get stuck in a wall | Ghost Bicycle glitch | Glitch encounter system | Glitch City RAM Manipulation | Infinite Blaine Door | Introduction Nidorino glitch (Red and Blue only) | Invisible PCs (Red and Blue only) | Invisible tree glitch | Item stack duplication glitch | Mute the music in the Pokémon League | Partial trapping move link battle glitch | Pokémon Tower Pokédex glitch | PP underflow glitches | Recovery move glitch | Rival's effect | See a Ghost without a Silph Scope | Selfdestruct and Substitute glitch | Silph Co. PC Glitch | Slot machine glitch | Stand on a tree | Statue behavior glitch (Red and Blue only) | Super effective move AI flaw (Red and Blue only) | Super Glitch | Surf down glitch | Swift miss glitch | Transform assumption glitch | Transform Empty Move Glitch | Trick Zone | Vending machine purchase glitch | Walk around with only fainted Pokémon (Red and Blue only) | Walking lag glitch | Walk on water through Surf | Walking Pikachu happiness glitch (Yellow only) | Wild appeared! | ZZAZZ Glitch

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Please note that this article refers to glitches which only exist in the Japanese versions of the specified Pokémon game, or refers to glitches from games which were only released in Japan.

These glitches do not exist in other translations of the game.

The Swift miss glitch is a glitch in Pokémon Red and Green, Pokémon Blue (Japanese) and Pokémon Yellow (Japanese) where the move Swift (called スピードスター "Speed Star") may miss if the target Pokémon doesn't have a Substitute up.

How to perform

First, you need a Pokémon that knows the move Swift. Various Pokémon learn it through level-up, including Pikachu, Sandshrew, Sandslash, Magnemite, Magneton, Voltorb, Electrode Staryu and Mewtwo. A girl in the Route 12 gate 1F gives the player TM12, which teaches Swift.

When using Swift, the move may miss if the player has no Substitute up ; however, it will always hit a Substitute.

The girl's description of the move is :

   スピードスター という わざよ
   この わざは めいちゅうりつが
   すごく たかいの
   まけられない しょうぶの とき
   やくに たつ はずよ
   TM39 is
   a move called Speed Star.
   This move's accuracy rate
   is very high.
   During a battle you can't lose
   it should be useful.

(Thanks IceFlame for the translation) However, the video down below showcases a Pikachu's Swift missing against a Pikachu who used Double Team several times.

Swift has a 1/256 chance of missing anyways, and is affected by Accuracy-reducing and Evasion-raising moves.

This glitch was fixed in all English versions, but the fix introduced the Substitute drain move not missing glitch.


YouTube video by ChickasaurusGL

(happens near 2:40 for Pokémon Yellow (Japanese), though it's not obvious if you're not fluent in Japanese)


Thanks to IceFlame for the research.

Original GCLf thread