In 'Ro-Jim-Bo', the contestants play Janken-pon (Rock-Paper-Scissors) against an Emerald Guard.
The contestant stands on a platform, with the guard on another next to them. Music begins to play, and the contestant and guard have to dance. When the music ends, both of them have to show their chosen sign (a fist for rock, a flat hand for paper or a sideways 'V' sign for scissors).
As in a normal game, rock beats scissors, scissors beat paper, and paper beats rock. If the contestant beats the guard they win; but if the guard beats them, the contestant loses and is lowered down into a pit of steam.