Pokémon - Season 10 Episode 18

Ash returns to Oreburgh Gym, ready to challenge Roark again. As the battle starts, Ash quickly surprises everyone when Pikachu manages to take down Onix. As the second battle begins, Ash pits Aipom against Geodude. After a long struggle, Ash manages to beat Geodude, and loses Pikachu and Aipom before the real test begins, defeating Roark's newly evolved Rampardos.