It's not the best game but it's not the worst either.

User Rating: 7.5 | Teenage Mutant Ninja Turtles: Smash-Up WII
I think I went into this game with too high of expectations. Why wouldn't I? One of the people who worked on Super Smash Bros. Brawl worked on it. It looked like similar gameplay in the videos. And when I got it the game was very enjoyable. I still have fun with the online gameplay and playing with friends. But there are some flaws. First off, I would have liked a wider variety of characters with more unique abilities. And the story mode was lacking and seemed like it had been done before. How you get the characters was just annoying and repetitive. For Ninja Turtles fans this game will satisfy, however others will find it lacking so for those people I would recommend a weekend rental. If you are just getting into video ames I would highly recommend it. More hard core players may find it easy but there are difficulty settings.