Bana Bana

Bana Bana is the boss of the AST: in. It is a large, multi-headed carnivorous plant, similar to AST:. AST: is the monster who is responsible for contaminating the AST: found within the AST:. As in, the AST: is dying due to an infestation of monsters.

When AST: arrives, the AST:'s sprout is dying, and needs the AST: found within the great tree itself. He ventures in to find that AST: has contaminated the water, and proceeds to battle the creature. He is able to destroy it by feeding the respective color of spore to the appropriate head, three times for each of the three heads.

Trivia

 * AST:, which also plays as part of the AST: music, is remixed into the music when fighting AST:.