Gabriel and his team, the MYCUNs, had heard that MYCUN City is in trouble, and it's because Koba and his minions are taking over every GreenyToons universe and the real world where humans live. After researching for a Wikia user named Laser Pikachus (Mikko), the MYCUNs had to recruit other good characters from other GreenyToons universes and defeat Koba, his devious henchmen, and other evil GreenyToons characters, especially Gree Guy, before the invasion occurs.