Greninja

Greninja is the Ninja Pokémon from the sixth generation of Pokémon. It evolves from Frogadier at Level 36, after evolving from Froakie at Level 16.

Generation 6
Greninja has only appeared in one Pokémon generation, the sixth one. He is not catchable in the wild, so the only way to get him is to evolve Frogadier or trade.

In the competitive Pokémon scene, Greninja is top tier thanks to its speed and its Hidden Ability Protean which makes it change its own type to the attack it is using, which gives his attacking moves a boost.

In Smash Bros series
Greninja appeared as a playable character in Smash Bros for 3DS and Smash Bros for Wii U. In the games he is speedy and can use projectiles as well as fight up close.