Torrent (げきりゅう Raging Rapids) is an ability introduced in Generation III. Torrent is exclusive to Water-type Starter Pokémon, with the exception of Panpour and Simipour in the Dream World.
Torrent raises the Pokémon's Water-type attacks, making them do 150% damage. However, this only happens when the Pokémon's HP is at 30% or less of its maximum HP.
Only Water-type Elemental Monkeys in addition to Water-type Starter can have it.
Barry's Empoleon's Torrent activated