Greninja is a Water/Dark-type Pokémon introduced in the sixth generation of the Pokémon series. It evolves from Frogadier starting at level 36 and is the final form of Froakie. Known for its ninja-like appearance, Greninja has a sleek, blue body and a distinctive scarf made of its own tongue. Greninja is recognized for its speed and agility in battles, making it a popular choice among trainers. It has the unique ability Protean, which allows it to change its type to that of its last used move, providing strategic advantages during combat.