Bentley's Outpost: As Bentley, destroy all the totem poles

Spike's Arena: Defeat Spike

Bamboo Terrace: Follow the question mark bottles to the end

Spooky Swamp: Defeat Sleepyhead

Mushroom Speedway: Fly Through 4 Star Speed Boosts In One Lap

Icy Peak: Destroy 6 icy things using the cannons

Complete the final wave in a gold Survival.

Buzz's Dungeon: Defeat Buzz

Seashell Shore: Defeat Bluto's nuclear shark submarine

Cloud Spires: Glide for 5+ seconds (and land safely!)

Reach rank 20 in any role.

Collect every gold bolt.

Acquire every weapon in the game.