Closed menu Select glitch

Closed menu Select glitches are a division of Select glitches in Pokémon Red, Green, and Pokémon Blue (Japanese). Examples of closed menu Select glitches include the dokokashira door glitch, fossil conversion glitch and Trainer mutation glitch.

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.

These are the Select glitches that are accessible by pressing B on the item or PC item inventories and later bringing up the Pokémon menu via a battle, the Lavender Town Name Rater or Pokémon Day Care Center man.

When the Select button is held down on a bag or PC item, the game writes to memory address CC35 which is a value for the list entry number highlighted. Due to an oversight, the game does not clear the value after the menu is closed with B, allowing the player to swap entries beyond the end of the list. For example, pressing Select on Bag item 10 from the overworld, exiting with B, B and entering a battle will allow the player to swap Pokémon 10 with a Pokémon of their choice and cause memory corruption, even if less than 10 Pokémon were in the party.