Koby appears as a Promo card for the One Piece Card Game, issued in the Saikyo Jump–April 2025 Japanese variant set (card #092) with Saikyo Jump rarity. The entry situates itself among promotional releases tied to magazine collaborations rather than standard booster runs. Market data lists the current value at $0.00, indicating no recorded paid sales or widespread demand. Collectors typically view it as a niche promotional piece relevant to completionists and set-focused builders.