A giant space rock is discovered on the bottom of the sea, and is lifted to the surface. The rock is actually a giant spacecraft which contains an alien creature that has, over millions of years, lost its physical body. The creature steals genetic information from Godzilla and mutates into Orga, a monster with the same regenerative capabilities of the Monster King himself. After an epic battle, Godzilla succeeds in destroying Orga once and for all. (Godzilla 2000: Millennium)
Zilla Junior, along with the HEAT Team, continues his battles with the various monsters and mutations that threaten humanity.