Apollon leads Team Greece Junior in the World Tournament arc, representing the narrative's pinnacle of boxing prowess. He assists protagonist Jun Kenzaki during Kenzaki's semifinal match against Führer Skorpion before facing Ryuji Takane in the finals. His combat centers on the devastating superblow "God Dimension," which manifests with solar destruction imagery visually conveying its overwhelming force.

Following the tournament, Apollon allies with Team Japan to confront the antagonistic organization Asura, demonstrating collaboration beyond national rivalries. He emerges as the sole survivor from the original Greece Junior roster after their collective defeat, underscoring his resilience. In his climactic battle against Ryuji Takane, Apollon pushes the protagonist to near-defeat, showcasing strategic depth and physical endurance that positions him as one of Ryuji's most formidable opponents.

His character design draws upon mythological symbolism through techniques like "Icor," emphasizing his thematic connection to divine power. Apollon transitions from antagonist to ally during the Asura conflict, reflecting narrative development beyond his initial appearance.