An interesting Idea, but not quite right
My basic thought on this game is that Bandai tried something very interesting in this title, unfortunately, the execution is not quite there. The game design flaw as I see it is that many times we are presented with instructions for our double pens when we could easily make do with only one. On top of that there is no where built in to house a second stylus, so you are kind of left either not porting around the portable gaming system OR pocket the stylus and potentially lose it.
The games themselves are kind of fun. You have some decent variety in terms of the sports, however, some of the controls are just plain frustrating. I could never really get the hang of basket ball... well I could do it but it just seemed way too complicated. You could easily download an app on your phone to play basketball with similar features and have a lot more fun!
All in all if you see this game cheap and you like cartoony, casual sports games you may want to pick this up. Otherwise you may want to find something better