????? will act as 'cancel' on the party Pokémon screen. ????? cannot be healed via a Pokémon Center as the game will take it to be the end Pokémon slot. Therefore, if ????? is placed above other Pokémon in the party screen, those Pokémon also cannot be healed. However, ????? and the Pokémon below it can be healed with items.
This type of ????? cannot be deposited because it will replace itself and all Pokémon below it with "CANCEL".
????? can be taken into the Time Capsule to 'hide' the Pokémon below it which did not exist in Generation I. "CANCEL" is allowed through the time machine because it is essential on all Generation I and Generation II Pokémon games. Any Pokémon below it will appear as 'M (00)RB or 3TrainerPoké $Y.
Game data
Pokédex entry
After ????? is caught and displays its Pokédex entry, the game will freeze.
This glitch Pokémon article is part of Project GlitchDex, a Bulbapedia project that aims to write comprehensive articles on glitches in the Pokémon games.