Coin Case glitches: Difference between revisions

When the game jumps to $E112, it starts executing data related to [[Pokémon]] cries as machine instructions. In particular, when {{key|II|Coin Case}} is used after hearing the Machop cry, the game will eventually reach address $E912. Data around that address is related to the overworld and can be manipulated through moving around in different patterns. When exiting Professor Elm's Laboratory and moving four steps to the right (prior to using the Coin Case after hearing the Machop's cry), the game will jump to address $FA98, which is in the middle of the data of the third Pokémon in the player's party. The game can therefore be made to execute specific code, based on the Pokémon's attributes such as species, item held, ..., by deliberately placing party Pokémon. By placing a specific species of Pokémon in the fourth slot of the party with the correct held item and first move, the game's execution may even be made to jump to the memory area that stores the items deposited in the player's PC, where code will execute based on the identifier and quantity of the items in the PC.