Pokémon S11 E16 A Triple Fighting Chance!

"Gotta catch 'em all!"

Maylene finally accepts Ash's challenge. Ash uses Staravia, Chimchar, and Buizel against Machoke, Meditite, and Lucario. The battle between Buizel and Lucario ends up in a tie but Maylene still gives Ash the Cobble Badge.