After defeating two Ultra V robots at "Tsunopolis", the lead monster is abducted by a UFO that takes it back to the mothership. There the lead monster has to fend off three Zorgulons before being abducted once more when the mothership explodes, causing the UFO to crash into the North American city of Capitol. There, the alien leader Cerebulon attacks in a multi-layered tripod battle suit. After Cerebulon is defeated, the lead monster victor watches as the last part of Cerebulon, a small timid insect like creature flees. A short movie is shown about the monster's origin depending on who the player chooses. The only exceptions are Raptros the dragon and Zorgulon the alien creature who has their own ending with roar in victory.