True Ninja

A green anthropomorphic turtle with a red bandana fights a humanoid figure in a silver helmet, delivering a punch that causes the figure to collapse; the scene shifts to show two turtles celebrating over a defeated enemy, then a turtle with a blue bandana fighting a large creature with claws, followed by a close-up of a brain being crushed by a wooden stick, and finally a turtle with a purple bandana smiling confidently, before the scene cuts to a turtle with a blue bandana holding a sword to a man in a black beanie who raises his hands in surrender.