Who don't know about Greninja? It's one of the most famous pokémon around!

Greninja's movements are swift, rapidz quick and graceful, akin to those of ninja. It uses this speed to confound enemies while slicing them up. It can compress water into various weapons to slice up enemies, most commonly in the form of its Water Shuriken, though it can create water katana and water kunai. It can also create shuriken from the mucus it excretes from its thighs for sharp projectiles that can split through metal.

One of the most recognizable characteristic of this Pokémon is it's tongue, that is extremely long and many times its own height, and strong enough to catch and hold an average human. However, instead just keep it inside it's mouth or keep it hanging around, Greninja usually keeps its tongue wrapped around its neck like a scarf. Doing that also is beneficious to it because It exposes its tongue to air movements, allowing Greninja to detect enemies it otherwise could not see.

By the way, Don't ask about Greninja Ash.

There was Greninja, sitted on a Lily Pad, feeling the water of the rain on it's skin...

It is just there, meditating, with it's eyes supposedly closed (It only has the pupils slitted), It looks so peaceful in there...