Ring King Cheats

Ring King Invincibility
At the title screen press A on Controller 2, then press A, Select, A on Controller 1. Next press B on Controller 2, then press Select on Controller 1. Finally, press A, B on Controller 2, then press B, B on Controller 1.

Ring King Faster KO
When you fight your opponent, get him to go one side of the ring. Press the directional button in which you face your opponent and press B.