It's a Shoe-In

Henshine Mario de Tsukisusume (With Boots On, GO! GO!) is the sixteenth Japan-only e-Reader level of Super Mario Advance 4: Super Mario Bros. 3. It takes place in a castle-like area, with many spikes in the level, requiring the Goomba's Shoe for navigation. This level contains many Thwomps, Koopa Troopas, and three Advance Coins. At the start of the level, Mario will land on a floating P-Switch instantly, making navigation to the first Goomba's Shoe possible and providing acess to the first Advance Coin. This level (as seen in the picture on the right) reveals that it is possible to defeat Thwomps with the Goomba's Shoe.