Teenage Mutant Ninja Turtles, Season 2

Drako:
(Narrating) Behold the Battle Nexus, the ultimate arena, where warriors from many dimensions come to compete against each other. I, too, spent my youth in such foolish pursuits. I was known and feared throughout the multiverse until I lost to a rat. Now the rat and his brood have returned, interrupting my schemes for power, but offering opportunities for revenge. Now, while I plot to seize control of the Battle Nexus, my pawn, the Daimyo's son, has poisoned the one called Leonardo. The rat rots in the dungeon, framed for attempting to assassinate the Daimyo. And despite the heroic efforts of the samurai rabbit and the turtle ninja, the Daimyo will soon be dispatched and the power of the Battle Nexus will be mine.