Poketto monsutâ - Season 6 Episode 23

Ash and crew have landed on a beach where they set up camp and to start training for Ash's rematch with Dewford surfing gym leader Brawly. But a mysterious Pokémon is lurking underground. Ash decides to find out the identity of the mysterious Pokémon and try to capture it. Easier said than done. The mysterious Pokémon turns out to be a ruffian Pokémon called Corphish and capturing it isn't as easy as it appears to be as it's capable of knocking out everything in its path including Pikachu and the team's campsite with a simple flailing of its fists. Ash then decides to send out his Willey Treeko to finish the job. Can Ash capture Corphish and train it before his rematch with Brawly?