@retro junkie lol... I don't remember that game either. would you recommend it?
If you like adventurish, final fightish, and old school pattern bosses, with a sort-of storyline, you might get a thrill out of the game. Once you beat the game you have all the special stages that you opened up to finish. This is a one or two nighter, depends how you pace yourself in the game. The game gave me a satisfying Batman mini game feel. The animation is very good. It might be better than the cartoon, never watched Brave and Bold series.
If you are itching for a quick DS game I would recommend it. I think there is not enough here to motivate most gamers to come back to, once you have unlocked everything, unless you are a Batman fan. Definitely fan based. It will be one of those games that I will return to, just to use the Batman character to beat up some bad guys. It is a pretty cheap pickup on eBay.
Young 8, 9, or 10 year old would play it to death.