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Closed menu Select 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.
Japan.gif

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

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.

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.


Method

  1. Open the Start menu(*)
  2. Open the Bag(*)
  3. Highlight an item with 'Select'
  4. Close both menus with B, B.
  5. Enter battle and access the 'PkMn' menu.(**)

(*):Steps 1 and 2 can be replaced with accessing the player's stored items in the Pokémon storage system. Additionally, in version 1.0 of Red and Green (but not Rev A or Japanese Blue) it is not necessary to open the Start menu and a Select glitch may be performed by pressing Select from the bag item menu within battle. This enables the partial switch glitch.

(**):Step 5 can be replaced with choosing to deposit a Pokémon with the Pokémon Day Care on Route 5, or rating the name of a Pokémon at the Name Rater's house in Lavender Town.

After opening the Pokémon menu, the select button remains highlighted in the same position as it was when highlighting an item. This allows for the player to swap one Pokémon in the middle of battle. If the cursor is placed out of bounds of the Pokémon menu, then this allows for the player to swap portions of the game's internal memory, resulting in a number of 'select button glitches'.