Shark Boss

At the start of the fight, the Shark will choose between three actions. He will swim up to one of the three ice blocks and destroy them, but will choose one of them randomly. After two attacks, he will jump on top of a block, making himself vulnerable to attack. The Shark Boss moves between two pre-determined points via Timeline.

Most bosses have similar logic, where the boss will randomly choose between attacks, and move around the stage in pre-determined locations via timelines.