Jindai

ジンダイ

Jindai (Brandon) remains a mystery for much of the Battle Frontier saga. Unlike the other Frontier Brains, his silhouette does not appear individually during the opening sequence; he is only visible in the center of the group shot. Trainers discover the location of the Battle Pyramid only after collecting the other six Symbols. This might indicate that Brandon ranks higher than the other Frontier Brains, although in the video games and manga, that position belongs to Anabel. When Ash finally obtains his sixth Frontier Symbol in "Second Time's the Charm!", he learns that the pyramid is located near Pewter City.
His first battle with Brandon takes place in "Battling the Enemy Within!" At that time, however, Ash is possessed by an ancient king of the Pyramid, who battles Brandon's Regirock using Ash's Sceptile. Sceptile is defeated, although Ash eventually regains control of his body, and the Pyramid is moved to an area near the Indigo Plateau.
During their second battle in "Overjoyed!", Ash's Torkoal faces off against Brandon's Registeel. However, like Sceptile, Torkoal is defeated by Brandon's Legendary Pokémon.
In "Gathering the Gang of Four", Ash and his companions meet Brandon in a forest. In "Pace - The Final Frontier!", Brandon and Ash engage in a 4 vs. 4 battle. Brandon's Dusclops defeats Ash's Charizard in the first round, but is then defeated by Ash's Bulbasaur. Next, Brandon's Ninjask faces Ash's Squirtle, and Squirtle manages to beat Ninjask with a Hydro Pump. In the following round, Squirtle is defeated by Brandon's Solrock, which subsequently draws with Bulbasaur. With both trainers down to their last Pokémon, Ash uses Pikachu while Brandon reveals another Pokémon from his legendary collection: this time, a Regice. Despite the odds, Pikachu holds its own against the legendary golem and emerges victorious, becoming only the second Pokémon in the anime to defeat a Legendary Pokémon, after Charizard.
Brandon appears again in "A Pyramiding Rage!", where he intends to research the Snowpoint Temple. While meeting with Ash and his friends, he is challenged to a full battle by Paul. Paul loses the match easily because he loses control of his emotions. Brandon later mentions that they will battle again when Paul is ready.
In "Pillars of Friendship", Brandon tries, and fails, to stop Pokémon Hunter J from disturbing Regigigas in the Snowpoint Temple, which then goes on a rampage. It eventually calms down when Brandon saves it from being turned into a statue by J. Brandon then decides to stay at the Snowpoint Temple, not only to rebuild it, but also to allow Regirock, Regice, and Registeel to become the new pillars that protect Regigigas.