The kurbio's shoe is a large shoe obtained in level 5-3. Kurbio is the japanese word for goomba which is fitting since you get the shoe from them by hitting a block they happen on top of. It allows you to jump and kill spiked enemies in one hit. it allows you to go on things such as dark nipper plants, spikes, and more. the downside is you can't sprint and it disappers when you complete the level. The only powerup compatible with the shoe is the fireflower.