Unlockable: Pipe Works Construction Kit
You must defeat Donkey Kong at Pipe Works.

Unlockable: Spooky Attic Construction Kit
You must defeat Donkey Kong at Spooky Attic.

Unlockable: Toadstool Castle Construction Kit
You must defeat Donkey Kong at Toadstool Castle.

Unlockable: Toad Minis
You must achieve bronzes on all 80 levels.

Unlock Special Kits
Collect all the letters to spell mini mario in all 8 worlds. A mini game will be unlocked where you must touch a total of 25 mini shy guys. Touch 25 or more of them in three worlds you will unlock one kit.

World 1, 2, 3 special kit 1 is mini Toad

World 4, 5, 6 special kit 2 is mini Peach

World 7, 8 special kit 3 is mini DK