Acquire all upgrades for Rey

Finish the game with Mike and Dan

Acquire all upgrades for King

Use a total of 99 lives in game (cumulative through multiple playthroughs)

Acquire all upgrades for Oak!

Finish the game in the Hard Difficulty Setting

Finish the game in the Normal Difficulty Setting

Win a Match on Versus Mode (either Local or Online)

Finish the game with 2-4 players in co-op, either local or online

Beat the Final Boss (Final Form)

Beat the Fifth Boss

Beat the Fourth Boss

Reach the First Bonus Stage