Pokémon: Advanced Generation · Battle Frontier arc
AG177 · Grating Spaces!
タケシ＆サトシ！タッグバトルでニビジムを守れ！！
Synopsis
What happens.
En route to the Battle Pyramid, his friends arrives at the Pewter Gym. A strange looks overcomes everyone and Brock explodes with the sight of the frightful remodeling of his beloved Gym.
Synopsis adapted from Bulbapedia's AG177 entry, used under CC-BY-NC-SA 2.5.
Story arc · AG146-AG192
Battle Frontier.
Cast returns to Kanto. Ash faces seven Frontier Brains (Spencer, Tucker, Lucy, Greta, Noland, Brandon, Anabel). Defeats all of them, including legendary Brandon (Regice + Registeel + Regirock). Turns down a Frontier Brain offer.
Read the full Advanced Generation guidePokémon featured · 20
Who appears.
Linked entries open the species page on the Pokédex. Items without a sprite (alternate forms, regional variants, generic group references) fall back to a name pill.
More from this arc
Other episodes in Battle Frontier.
Episode synopsis from Bulbapedia, CC-BY-NC-SA 2.5. Editorial context (arc affiliation, cultural moments, character signatures) hand-verified May 2026. Pokémon, character names, and series titles © Nintendo, Game Freak, Creatures Inc., The Pokémon Company, OLM Inc. This is an unofficial fan reference.