Pokémon: Advanced Generation · Battle Frontier arc
AG171 · Pokémon Ranger - Deoxys' Crisis! Part 1
ポケモンレンジャー！デオキシス・クライシス！！（前編）
Synopsis
What happens.
Ash and his friends continue on to May’s next Contest. May is excited in that she needs one more Ribbon in order to get into the Kanto Grand Festival. Brock is excited that he gets to revisit Pewter City, while Ash is preparing for the Battle Pyramid.
Synopsis adapted from Bulbapedia's AG171 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 · 13
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.