Boss Endurance

Boss Endurance appears in many Kirby games. It is a mini-game where Kirby battles all the bosses from game.

How it works
Since Kirby's Adventure, it has been a series tradition for one to complete the game (usually when you defeat the final boss), you earn a mini-game where you fight all the bosses, with the final one always being last. The name of this mini-game varies (V.S. Boss, Boss Butch, The Arena, Boss Endurance, etc.), plus the transition from one boss to the next one, and what happens after you complete the mini-game. In some games, you fight the bosses in order. In some games, there are no transition rooms. In some games, you go to a room with copy abilities before the actual fighting starts. In some games, you fight bosses in a random order, but the final boss is always the last. In some games, you will also go to a room to fight a team of mini-bosses. In some games, you will also go to a room to fight regular enemies, like Waddle Dees. In some games, you will go to a room, in-between two boss rooms, where you can get a copy ability and eat from a limited number of Maxim Tomatoes. When you complete the mini-game, you get a congratulatory message, and sometimes it says how long it took you to do something.