The friction between Donatello and Raphael, and Raph’s disrespect of what his smarty-pants brother brings to the team, causes Donnie to use Metalhead to attempt to teach him a lesson. Faking an emergency of the Kraang taking over the robotic turtle, the brothers struggle to stop Donnie’s invention – especially after he really does loose control.
Teenage Mutant Ninja Turtles: New Animated Adventures #9 also offers a back-up story of Raphael’s tall tale to his brothers about a fight with an actual dragon rather than admit the his new black-eye came courtesy of training with April.
Both stories are fun and play on basic character traits of the Turtles. The first story allows the two to eventually come to an understanding. The second showcases Raph’s bruised ego and Donnie, Michelangelo, and Leonardo choosing not give their brother a hard time after learning his shiner came in the service of helping a friend. Worth a look.