From the Super Mario Wiki
Cup King is the Round 1 boss of Wario Blast: Featuring Bomberman!, formed out of the three Madbombers. It brings out three mini-enemies. Each of these mini-enemies can be destroyed by one blast. Cup King can also fire bullets out of its trunk. Bomberman or Wario must defeat the boss by blasting it with bombs when Cup King is close to the blast. After three hits, Cup King is defeated and the protagonist moves to the next stage.
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