Ditto (Japanese: メタモン Metamon) is a Normal-type Pokémon introduced in Generation I.

It is not known to evolve into or from any other Pokémon.

It can breed with any Pokémon other than the Pokémon in the Undiscovered group and other Ditto, including some gender-unknown Pokémon, to produce Eggs of the other's species.

In its natural state, Ditto is a light-purple or pink blob-like Pokémon with vestigial facial features. It is often referred to as amorphous, but has a relatively consistent appearance in official artwork, including two small nubs on its "head", a few soft lumps at its base, and two pseudopod-like protrusions in place of arms. The face consists of beady eyes and a simple mouth; almost always pulled into a smile.

(Source: Bulbapedia)