Greninja uses water to propel itself upward, in a manner similar to Pikachu's Quick Attack in that it can change directions while it moves, however unlike Quick Attack, the move can move twice the distance in a single direction and is a little slower, which gives it better maneuverability than Quick Attack does. Hydro Pump also deals slight damage with decent knockback and does not cause flinching, which can be used to gimp. While it offers excellent distance, Greninja will immediately start falling once the second water stream ends, which can often cause inexperienced players to underestimate the vertical distance gained from this move.
Special Move customization was added in Super Smash Bros. 4. These are the variations:
Use by other Pokémon
Hydro Pump is a powerful special Water-type move that was introduced in Generation I and was considered the strongest Water-type move before Generation III.
Greninja is capable of learning this move by leveling up. Hydro Pump is described as "blasting the foe with a high volume of water" and is usually depicted as a single, large torrent of water launched at the foe, contrary to Greninja's usage in SSB4 which involves riding two thin jets of water in the style of the Smash' version of Quick Attack (which has a Pokémon series Water-type variation known as Aqua Jet).
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