Nullzilla is a monster made entirely of Nulls. Nullzilla was formed when Hexadecimal was attacked by a Web Creature. The creature infected Hex and the Nulls in Mainframe could sense her distress and swarmed into her Lair and began to cover her. They were trying to protect the rest of Mainframe from the creature. Phong was already prepared for this disaster and suited Bob, Dot, Enzo, Mike, and Frisket into special combat uniforms and gave them each large vehicles to form a Giant Robot to battle Nullzilla.