Johnny discovers the B.F. Gang, Unicorn, and takes control of Giant Robot, his ally in the fight for good over evil.

The emperor sends a huge magic metal globe to Earth with orders to arrest Johnny and the robot when they come to destroy it.

The emperor attacks Earth by bringing back an ancient space plant that devours everything it touches.

Emperor Guillotine sends Dr. Over and Ligon, a new weapon in the shape of a pyramid, to the Earth, where Ligon attempts to cripple the world's economy by destroying Middle Eastern oil fields.

Satan Rose, a space plant that almost destroyed the Earth, returns and becomes active again.

Dr. Over makes Ligon swallow a train near Lake Biwa to kidnap one of the passengers and head of the Kyoto Branch of Unicorn Organization.