Ditto

Ditto appeared in 1996 video game called Pokémon Red & Green. Ditto is a Transform Pokémon. Ditto can change its shape to resemble just about anything, and it sometimes uses this talent to befriend other Pokémon. Some are more skilled at duplications than any others.

Ditto's appearance is very plain. It is a simple, pinkish-purple, amorphous blob, with two small dots as eyes and a long, curved mouth. Though its appearance can be changed via Transform, although in the anime if a Ditto shape-shifts into any Pokémon it will have the exact shape, appearance and size, but it will have Ditto's face like it did in the movie when it shape-shifts into a human, and any large Pokémon that it shape-shifts into will be small. A shiny Ditto is blue, as opposed to the normal purple.