This Feraligatr is a water-type Pokémon owned by Raiden.
Raiden had a Feraligatr, who was trained to be a participant in the Sumo Contest. It was an agile Pokémon, who changed offensive and defensive attacks. When Team Rocket's Wobbuffet, dressed as Miltank, used Counter, Shonosuke disqualified them. They went after the prize, but were blasted off by Feraligatr's Hydro Pump. It fought bravely against Ash's Snorlax, but lost.