Item duplication glitch: Difference between revisions

The '''Pokédex 000 item duplication glitch''' (known in some circles as the '''Rare Candy glitch''' due to the preferred item chosen to duplicate) is an infamous [[glitch]] in {{game|Red and Blue|s}}. It allows the player to duplicate items in his [[bag]].

Through the development of {{game|Yellow}}, which occurred in the two years following the release of {{game|Red and Green|s}} in Japan, the [[old man glitch]] was disabled by blanking the data for wild Pokémon before overwriting it, and reprogramming shore tiles to not have any Pokémon. However, it is still possible to encounter [[Missingno.]] and exploit the item duplication glitch using the [[Mew glitch#Ditto glitch|Ditto glitch]] although encountering non-fossil or ghost Missingno. on {{game|Yellow}} will commonly freeze the game. The glitch Pokémon [[g g]] and [[$ (Yellow)|$]] are also possible alternatives, through a combination of the [[Johto Guard glitch]] and the [[Cable Club escape glitch]], but both may also freeze the game after being sent out from the opponent's side.

The sixth item in the bag is duplicated. The quantity of this item will be increased by 128, provided that the number of items in the sixth position is less than 128. This means that the player is free to perform the glitch again by swapping the item, or using/tossing the duplicated item to reduce its quantity back under 128. If the player catches the 000-variant in battle, then it becomes possible to duplicate the sixth item again, given that another item (with a quantity less than 128) was switched into the sixth position in the middle of battle.  

[[Key item]]s can be duplicated, but the only key items which are practical to duplicate are the [[Dome and Helix Fossils|Dome Fossil, Helix Fossil]] and [[Old Amber]]. Key items will stack, but the number next to the associated key item will not be visible. Under normal circumstances, it becomes impossible to remove duplicate key items without storing them one at a time in the PC, however fossils are an exception to this, because the game allows the player to revive the same fossil Pokémon more than once.