2 species have Torrent as a hidden ability, 27 as a normal one

Effect, in PokéAPI's words

“Strengthens Water moves to inflict 1.5× damage at 1/3 max HP or less.”

As a hidden ability

Species	Slot	Note
Panpour	Hidden
Simipour	Hidden

As a normal ability

Species	Slot	Note
Squirtle	Normal
Wartortle	Normal
Blastoise	Normal
Totodile	Normal
Croconaw	Normal
Feraligatr	Normal
Mudkip	Normal
Marshtomp	Normal
Swampert	Normal
Piplup	Normal
Prinplup	Normal
Empoleon	Normal
Oshawott	Normal
Dewott	Normal
Samurott	Normal
Froakie	Normal
Frogadier	Normal
Greninja	Normal
Popplio	Normal
Brionne	Normal
Primarina	Normal
Sobble	Normal
Drizzile	Normal
Inteleon	Normal
Quaxly	Normal
Quaxwell	Normal
Quaquaval	Normal

Elsewhere in PokéAPI

3 more holders without a page here

Alternate forms and other species that PokéAPI lists with Torrent.

Blastoise Gmax, Inteleon Gmax, Samurott Hisui