???-type Pokémon are glitch Pokémon. Through certain glitches, the player may obtain a ??? Pokémon. Arceus has ??? as a type in the coding, however that type of Arceus can only be obtained by using Action Replay and cheating. Also, before Generation V, the move Curse was a ??? type move. The player may also obtain ??? type moves along with other glitches and cheats. Eggs are also ??? type. If weather ball is used under shadow sky it becomes ???, even though shadow is more fitting.

v • d • e Pokémon Types Bug · Dark · Dragon · Electric · Fairy · Fighting · Fire · Flying · Ghost Grass · Ground · Ice · Normal · Poison · Psychic · Rock · Steel · Water Only exists within Generation II - IV: ???