The Teenage Mutant Ninja Turtles’ darkest and most depressing ... especially the characters with Mikey serving as a sensei/mentor to young Casey Marie, similar to Splinter.

It’s important not to judge Teenage Mutant Ninja Turtles: Tactical Takedown too ... they are growing apart in the absence of their sensei. That’s why we find Mikey alone in the Turtle Lair ...

Teenage Mutant Ninja Turtles: Mutant Mayhem features a Splinter who is not the sage-like sensei of past incarnations, but a fussy, overprotective dad, traumatized by his interactions with humans.

Teenage Mutant Ninja Turtles: The Last Ronin II - Re-Evolution focuses on Yi, Uno, Odyn, and Moja as they rise up from the sewers and with the help of their sensei, Casey, defend their war-torn city.