Duels of the Jungle! - S9.E38

On the way to Fennel Valley, Ash's Aipom scampers away and runs into a Weavile with an attitude. Aipom's up for a battle, but Weavile deals it a harsh defeat! Luckily, Ash and his friends meet a passing wilderness guardian named Kerrigan, who lets Aipom rest at his home. Kerrigan explains that the Weavile belonged to a local group of Weavile and Sneasel, but now it's alone and challenges any Trainer's Pokémon it sees. Ash resolves to help Kerrigan find the stray Weavile before anyone else is hurt.