Fight the school bullies
Acquire the Mermaid Cannon
Defeat the Pirate Captain
Finish the Night School level
Defeat The Crab Boss
Finish Act 1
Acquire the Drill
Finish the Circus Level
Defeat the Elephant Boss
Defeat the Bear
Finish Act 2
Acquire the Magic Mace
Defeat the Knight
Finish Act 3
Win a game of Snakes and Ladders
Acquire the Laser Staff
Defeat the Alien Robot
Finish the Halloween Level
Finish Act 4
Use every special move at least once
Play through the whole game using only the Fire Punch special move
Finish Act 5 and beat the game
Beat the game on Hard difficulty
Defeat the Giant Spider
Defeat Marigold