Chapter 1; Final Battle
No one knew how or why, they only knew that someone by the name of Tabuu was forcing them to have fighting tournaments. It was the final round of one of these tournaments. The battle was Sonic versus Invader ZIM at the Mushroom Kingdom arena. ZIM was in his disguise. Sonic used his homing attack. He hit ZIM directly in the face. ZIM retaliated quickly and pounced back at Sonic. Sonic easily dodged his attempt at attack and spin-dashed ZIM. ZIM grew angry and a giant laser gun popped out of the pack on the Irken's back. ZIM fired the laser at Sonic, dealing a lot of damage. Then an orb of flashing light appeared. Sonic jumped up to try to smash it, but ZIM's metal, spider-like legs snatched it out of the air. ZIM easily smashed it, and the legs retracted back into his pack. The sky darkened and ZIM's body started to glow. ZIM's contact lenses fell out and his magenta eyes, which turned white. ZIM used the Smash Ball's power. ZIM called Ultra Peepi. A giant mutant hamster that resembled a furry dinosaur appeared and punted sonic off the stadium. Sonic desperately tried to get back onto the stage, but failed. "I AM AN IRKEN INVADER!" ZIM said as Sonic fell "YOU WILL NEVER DEFEAT ME!"