Gusto

Gusto, known as Zawawa (ザワーワ Zawāwa^?) in Japanese, is the fourth boss of Bubble Bobble 4 Friends. He is the toughest boss monster you'll have to fight, and summons many lesser monsters into the level to attack you during the fight. The problem with this is that many of the ones he calls in land in places that are a serious problem, almost always guaranteeing you will be hit when trying to attack the boss. Most notably the Rosys and the Fluffys.