Super Mario World [SNES]
These were my first hacks ever!
Replace Mario with a Goomba or a Koopa Troopa!
Since these were my first attempts at rom-hacking, you may notice a palette error here and there, or something
small, but I don't think they turned out all that bad. My new frames of animation turned out better than expected. Both characters have almost all needed animations, including flying (cape) and swimming animations. I may have to give this a try again in the future.

Downloads:
GoombaHack.zip
KoopaTroopaHack.zip

Apply to a headered American Super Mario World ROM.