It's a Shoe-In

It's a Shoe-In (Japanese: Kutsu o Haite GO! GO! ( クツをはいてGO！GO！ ''With Boots On, GO! GO!, unofficially known as Castle à Go-Go)) is the sixteenth e-Reader level of Super Mario Advance 4: Super Mario Bros. 3''. It was originally exclusive to Japan, but became available internationally when the game was released on the Virtual Console in 2016. 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 and Koopa Troopas, with three Advance Coins as well. 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 access to the first Advance Coin. This level indicates that it is possible to defeat Thwomps with the Goomba's Shoe.

New Level Elements

 * ? Blocks containing Goomba's Shoes

Trivia

 * A fan-remade version of "Kutsu o Haite GO! GO!", created in Super Mario Maker was featured as one of Nintendo's weekly course selections. Subscribers to the Nintendo Newsletter received a mail on October 24, 2015, which included these course selections, and "Kutsu o Haite GO! GO!" was remade into one of them by a user called Nigge from Australia, as E-16: Castle à Go-Go!. The level is obviously designed in the vain of the NES Super Mario Bros. 3, and its ID is BC9E-0000-0082-FFF5.
 * A notable mechanical difference in this fan-remade level is that the Thwomps are rigid and can be stood on just as on platforms, provided that the player's character uses the Goomba's Shoe. On the other hand, in the original level from Super Mario Advance 4, players could even defeat the stone creatures using the said power-up.