Pokédex entries for Greninja. Because Greninja did not appear in any Pokémon games prior to Pokémon X/Y this list will only cover entries from generation VI to present.
X: It creates throwing stars out of compressed water. When it spins them and throws them at high speed, these stars can split metal in two.
Y: It appears and vanishes with a ninja’s grace. It toys with its enemies using swift movements, while slicing them with throwing stars of sharpest water.