Ditto

Its signature ability is to "Transform" into any other living creature it sees, perfectly replicating its form and abilities.

While it can use the transformed Pokémon's moves, its face often remains unchanged, with its characteristic beady eyes and small mouth visible on the new form.

It is a fire type pokemon

In its natural form, it appears as a small, pinkish-purple, shapeless blob with two beady eyes and a small, curved mouth.