An aged crime boss named Maximilian Greco discovers Ripster and Streex fighting Killamari and Repteel at a nearby zoo as part of Dr. Paradigm's plot to obtain animal specimens for his Genetic Engineering Chamber. Upon tracing Killamari and Repteel back to Dr. Paradigm, Maximilian Greco blackmails him into enhancing him with the strength of a rhinoceros and the longevity of a desert tortoise. Maximilian also has Dr. Paradigm have his chihuahuas Zeus and Apollo enhanced to fight the Street Sharks.

President Horne contacts the Street Sharks informing them that a UFO has been sighted in the Solar System. Upon investigating, the Street Sharks meet the Dino Vengers T-Bone, Stegz, Bullzeye, and Spike. The Street Sharks learn from them that they are after Bad Rap and the Raptors. The Street Sharks and the Dino Vengers join forces when the Raptors steal different weapons from different countries in order to make the other countries think they are being attacked by the other.