Siba holds a position within the Kanto region's Elite Four, testing trainers who aspire to become Pokémon League Champion. He specializes exclusively in commanding Fighting-type Pokémon and possesses a notably muscular build, consistently appearing without a shirt. During a decisive Pokémon League challenge against the trainer Blue, Siba deploys his Machamp. He demonstrates skilled Fighting-type tactics throughout the battle. However, Blue counters effectively with a Pidgeot, leveraging the Flying-type's inherent advantage. Siba reacts with stunned disbelief to both Blue's strategy and his own subsequent defeat. This loss contributes directly to Blue's progression through the Elite Four and his ultimate achievement of the Champion title.