Teenage Mutant Ninja Turtles (2003)

Season 2

Episode 23: Big Brawl (1)

As he does every three years, Master Splinter mysteriously goes off and leaves his sons for a few days. This time, however, curiosity sets in and the Turtles follow him through an interdimensional gateway, ending up in a nexus between dimensions, where the multiverse's greatest warriors meet to duel each other in tournaments. Despite his discontent, Master Splinter hesitantly allows his sons to enter the competition.