Pokemon Season 8 - Episode 373 – Solid as a Solrock

Ash duels Tate and Liza at the Mossdeep gym, who chooses Pikachu and Swellow against Lunatone and Solrock. At first, Tate and Liza argue with each other at the start of the battle, but regain their focus after Team Rocket shows up. Ash manages to defeat them and obtain his seventh badge.