This code will let you take your hat off in midair! First, go to bomb-ob battlefield as Yoshi, or any other character but Mario, and put on the Mario hat. Then hit the red block, take the feather, jump into a cannon, and shoot yourself out in any direction you want. Then fly at one of those bouncing balls of water, a chain chomp, or a goomba. If you hit a goomba or somehting else near the ground, then after you hit it fly as high up as you can. The moment you hit it, Mario's hat will come off you and you'll transform back into yourself in midair.