Bebop (TMNT 2012)

In The Big Blowout, Bebop and Rocksteady are upset that Shredder and Krang are treating them like servants. After finally being appreciated for their services, Shredder allows them to watch the destruction of the world. The two friends realize they don't want to destroy the world so they fight against Krang and destroy the rock minions. Bebop and Rocksteady then become super heroes instead of villains after they quit being henchmen