The "Bad Boss Brothers" Celebration Picture from Kirby Star Allies showing every final boss in the franchise (except for Team Kirby Clash Deluxe) up to that point.
A final boss is the last boss of a game or sub-game. Final bosses of games are usually fought with Final Weapons specific to the game (such as the Star Allies Sparkler in Kirby Star Allies), and tend to be the most difficult bosses in the game as well.
