One of the many monsters called forth by the
Xilien in their campaign to conquer Earth. Kumonga's
genetic structure contains a gene called M-Base,
the same gene found in the Xilien and their genetic
offspring and what allows the alien invaders to
control the monsters.
Bent to the Xiliens' will, Kumonga first attacks
a trailer park in Arizona as part of a global-wide
assault from the monsters Rodan, Anguirus, King
Caesar, Zilla, Kamacuras, and Ebirah. As quickly
as Kumonga appeared, though, the creature is teleported
away by his alien masters. Using the disappearance
of the monsters as a sign of loyalty between the
Xilien and humanity, who have yet to learn of
the alien invader's true intent, the Xilien move
to phase two of their plan as they warn against
an incoming star known as Gorath, which is on
a collision course with Earth. However, the Xiliens'
true intent is quickly discovered, along with
their ability to control those that possess the
M-Base gene. Their old plan in ruins and their
leader now dead, the Xiliens' forgo a more peaceful
approach to the invasion and instead unleash a
full scale attack combining the might of their
own fleet of ships with that of the controlled
kaiju. This approach appears successful, until
the Gotengo releases Godzilla from his artic prison.
Seeking a rematch with the flying battleship
that sealed him away almost 40 years ago, Godzilla
chases after the Gotengo, as the Xiliens' send
monster after monster to try and defeat the nuclear
giant. Finally, Godzilla arrives in New Guinea
where he is challenged by Kumonga, who leaps around
the King of the Monsters firing webbing at the
behemoth. However, Godzilla catches on fast, and
instead reacts by grabbing one of the creature's
strands of webbing before it can materialize into
a net. With the creature's webbing in hand, Godzilla
begins to swing the still attached Kumonga around
in circles before releasing, sending the giant
spider flying off into the distance.