Ditto (Japanese: メタモン Metamon) is a Normal-type Pokémon. It is not known to evolve into or from any other Pokémon.
Ditto uses the move Transform to copy the opponent's moves, types, form, and non-HP stats. It can breed with any Pokémon other than the Pokémon in the Undiscovered group and itself, including male Pokémon and some genderless Pokémon, to produce Eggs of the other's species.
In its natural state, Ditto is a light purple or magenta free-form shape blob with vestigial facial features. It also appears to have two vestigial, handless 'arms' protruding from its body. However, it can take the form of anything, even inanimate objects.