Hydro Pump is a non-contact Water-type move introduced in Generation I. It is very powerful, but it is not very accurate. It is also usually thought of as Blastoise's signature attack, although many Pokémon can learn the move. Its base attack power is 120 and accuracy is 80%.
The foe is blasted by a huge volume of water launched under great pressure. It inflicts damage and has no secondary effect. This move is one of the most powerful Water-type attacks.