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GameShark is a cheating device used to alter the internal data of many video games. It is well-known for its use in the Pokémon series, as it is one of the ways to easily obtain legendary Pokémon or Pokémon only available through an event, and many rare items, such as Master Balls, Rare Candies, or vitamins.

Use of a GameShark can sometimes cause corruption of a save file. This is especially likely if the game is not inserted correctly into the slot or if it is bumped while playing.


In Generations I and II

A GameShark code is made up of three parts. The first part is the code type, which is nearly always 01. The second is the quality digits, which are the digits that will go into that space in memory. This is usually represented by XX or ??, as these numbers can be modified to change what will be received. All values are in hexadecimal, instead of decimal (for example, 31 in decimal is represented by 1F in hexadecimal). The third and final part is the address in memory, represented in little-endian notation. For example, if the data at address C056 is to be modified, the end of the code would need to be 56C0. The code 010356C0 would tell the GameShark that the code type is 1, and that the value 03 will written to the address C056.

Unintended side-effects

Sometimes the game will give the player a bad egg, rewrite the bag contents, freeze the game, destroy a Pokémon, corrupt the Hall of Fame data, or simply corrupt the save file. In other situations, nothing unintended may occur.

Related articles

External links

Cloning glitchesGlitch PokémonGlitch Trainers
Error messagesArbitrary code execution
Generation I: --0 ERRORBroken hidden itemsCable Club escape glitchExperience underflow glitch
Fight Safari Zone Pokémon trickGlitch CityItem duplication glitchItem underflowMew glitch
Old man glitchPewter Gym skip glitchPokémon merge glitchRhydon glitch
Select glitches (dokokashira door glitch, second type glitch) • Super GlitchTime Capsule exploitZZAZZ glitch
Generation II: Bug-Catching Contest data copy glitchCelebi Egg glitchCoin Case glitchesExperience underflow glitch
Glitch dimensionGlitch EggSketch glitchTeru-samaTime Capsule exploitTrainer House glitches
Generation III: Berry glitchDive glitchPomeg glitchGlitzer Popping
Generation IV: Acid rainGTS glitchesMimic glitch
Pomeg glitchRage glitchSurf glitchTweakingPal Park Retire glitch
Generation V: Sky Drop glitchFrozen Zoroark glitch
Generation VI: Lumiose City save glitchSymbiosis Eject Button glitch
Generation VII:
Glitch effects: Game freezeGlitch battleGlitch song
Gen I only: Glitch screenTMTRAINER effectInverted sprites
Gen II only: Glitch dimension
Lists: Glitch movesGlitch types
Glitch Pokémon (Gen IGen IIGen IIIGen IVGen VGen VIGen VII)
Glitches (Gen IGen IIGen IIIGen IVGen VGen VIGen VIISpin-off)