Teenage Mutant Ninja Turtles (2003) 2x23

Every three years, Splinter leaves his students to go to parts unknown. Curious, the four Turtles decide to follow him this time. The pursuit of their master leads the Turtles into something they never expected, right into the middle of the "Big Brawl" : The Battle for the Nexus, a brutal tournament where fates will be decided...