After beating the game, return to Toad Town to find Collectible Treasure No. 120 (Origami Cranes) waiting for you next to a Toad at the very entrance of Toad Town.

To find Origami Character #39 (Shoe Goomba) go to the Breezy Tunnel and battle an enemy near the end of it to also battle a Shoe Goomba to ad it to your Museum Collection.