Small and Fiery Mario
From Glitches
From the game Super Mario Bros. for the NES.
Get a fireflower and reach any Bowser. Now, as you fight him, try to hit on the axe at the same time that he hits you with a fireball. He'll die, and if you did it correctly, you'll still be big as you walk over to Toad. Now, when you get a mushroom and fire flower, you'll be small but able to shoot fireballs.
Submitted by: Scott Kessler