Mario is the main villan and final boss of A Koopa's Revenge. He is fought in the final portion of Mario's Castle in a large mech version of himself.
Mario's appearance is generally the same as usual, blue overalls, red shirt, white gloves, brown shoes, and his signature hat. He also has brown hair, but has a black mustache. This Mario however has an evil mug.
Mario battles in a large mech version himself against Koopa. To defeat him, the player has to jump on the Mario Mech's hands as they move. Jumping on the thumbs will not damage it. The hands will soon be destroyed after 4 hits, leaving Mario to use other weapons such as a large Podoboo, Bomb-ombs, and spikes. The player must stay on the lowest side of the roof to avoid the Podoboo.