Shishkeba Boo himself has joined forces with the "Dark Monarch" Black Emperor, who looks to destroy Kinnikuman.
Two of his spies (series creators Yudetamago in a cameo) have learned of Kinnikuman's location, so they head for Earth.
However, Shishkeba Boo is outraged by this cowardly tactic and fights off the minions while Kinnikuman defeats Great Ukon with a Kinniku Buster.
When Kinnikuman refuses, he places Bibinba and her father on a large boulder and surrounds them with a lake of fire.
Suddenly, Terryman and Warsman arrive and pull him out while Robin Mask and Rikishiman save Bibinba and her father.
Kinnikuman eventually defeats Black Emperor with his own version of the Devil Fire followed by his new finishing move, the Kinniku Driver.