There are some good gags and clever innovations in the animated but there is one brilliant idea: casting Ice Cube as the voice of the movie鈥檚 mutant insect supervillain Super Fly.

It might have once been hard to foresee the value of having the emcee who rapped of 鈥渄ropping bombs on your moms鈥� as the MVP of a PG-rated kids movie. But we鈥檙e now up to the seventh 鈥淭eenage Mutant Ninja Turtles鈥� film, not counting all the series and videogames. That鈥檚 a lot of movies for a bit of IP that鈥檚 clung more firmly to lunch boxes than it has to pop culture. For the turtles, it was getting to be time to either, as Ice Cube would say, 鈥渃hickity-check yo鈥� self鈥� or try something new.

鈥淢utant Mayhem,鈥� which opens in theaters Wednesday, can鈥檛 entirely get over the feeling of trodding over well-covered turtle ground. But if we must go once more into the ooze, the film by director Jeff Rowe (co-director of ) and co-written by co-producers Seth Rogen and Evan Goldberg, is probably the best of a not-so-stellar franchise. It鈥檚 certainly the one most invested with that 鈥渢eenage鈥� part of the turtles鈥� name. Plus, it鈥檚 got Ice Cube as a fly who quotes from the O鈥橨ays.

The animation is vividly textured, the beat is persistently hip-hop (Lauryn Hill, De La Soul, Ol鈥� Dirty Bastard and others pack the electronic score by Trent Reznor and Atticus Ross) and the New York of the film is impressively detailed. But the most important twist to this 鈥淭eenage Mutant Ninja Turtles鈥� iteration may be diving into the teenage-ness of its 15-year-old turtles.

If 鈥淏arbie鈥� was balanced between 鈥淢utant Mayhem鈥� gives itself over more fully to the mindset of adolescence. That鈥檚 in the gross-out humor and the comic book-like feel of the animation. But these are also recognizable teenagers who watch movies (鈥淔erris Bueller鈥檚 Day Off鈥�), pine for concert tickets and make goofy phone videos of themselves slicing watermelons.

What Donatello (Micah Abbey), Michelangelo (Shamon Brown Jr.), Leonardo (Nicolas Cantu) and Raphael (Brady Noon) really want is to fit in and go to high school like other teens. They have been relegated to the sewer ever since Splinter, a rat voiced by Jackie Chan, happened upon them after they were exposed as hatchlings to the same ooze that spawned Super Fly 鈥� who himself was the product of experiments by scientist Baxter Stockman (Giancarlo Esposito, fated to dubious laboratories).

Splinter has much the same opinion of the majority of the rats in 鈥淩atatouille鈥�: Humans can鈥檛 be trusted. (Splinter鈥檚 particular fear is that they will 鈥渕ilk鈥� him.鈥�) So the turtles have grown up underground, a little like the homeschooled family of while yearning for the wider world.

They find a hint of it with a high-school journalist named April O鈥橬eil (Ayo Edebiri), who wants to document, and thus prove to humankind, their decency. At the same, the turtles meet the charismatic Super Fly (voiced with bombastic aplomb by Ice Cube) and his band of mutants. At first, they鈥檙e fast-friends 鈥� 鈥渃ousins,鈥� Super Fly says 鈥� but the turtles then start hearing of Super Fly鈥檚 plans to turn all animals into mutants and eradicate the world of humans.

鈥淧eoples, they got to go,鈥� chimes one mutant.

Some of the thunder of 鈥淢utant Mayhem鈥� has been stolen by 鈥淚nto the Spider-Verse鈥� and 鈥� films that likewise upend the typical look of studio animation and do it with a pulsing soundtrack; but they did it more eclectically.

Yet this 鈥淭eenage Mutant Ninja Turtles,鈥� while a half shell of those films, has its own low-key charms. It鈥檚 goofier, grosser and mostly fun. The four turtles are never more than a hard-to-differentiate bale of overlapping dialogue of doubt and anxiety. But that first word in their name finally feels genuine. Seven films in, it鈥檚 only right that Donatello, Michelangelo, Leonardo and Raphael should get a renaissance.

鈥淭eenage Mutant Ninja Turtles: Mutant Mayhem,鈥� a Paramount Pictures release, is rated PG by the Motion Picture Association for sequences of violence and action, language and impolite material. Running time: 99 minutes. Three stars out of four.

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