MAY CONTAIN SPOILERS!
I will update this as I play more of it. I played one game of every sport so I'm basing this review on that. The controls for all sports are easy to pick up. Be sure to do the tutorial, though. You might get confused at times with the controls but they are easy. Basketball was fun, especially dunking. Volleyball is easy and fun as well. Dodgeball was interesting. Hockey was different. Hockey was my least favorite mostly because when you switch characters during gameplay, the one you switched from just stands there for a second but then comes right back into play. I played each sport on easy and it was very easy because I won via blowout on each sport. 46-3, I think, in basketball. Haha. Remember that because I only played one game of each sport, I only saw four stages. I played at Mario's stage, Wario's stage, Koopa's Beach, and Toad's stage. I played as Mario and Yoshi for basketball, Peach and Daisy for volleyball, Donkey Kong and Wario for hockey, and Toad and Luigi for dodgeball. The special moves in the game are really cool and fun. I was very pleased with Luigi's in dodgeball. This is definately a game to play as a party game with lots of people. By yourself, just make sure it's on hard so there's a challenge. I haven't tried online but that's probably going to be fun with friends you can trust. Overall, this is a fun game and that's why we get games: to have fun. It's about what the players think, not anyone else. I think this is a fun game and I'm glad I got it.