Mario 64 DS, I thought, was a big dissapointment. Being a fan of the original Mario 64 I was thinking that the new instalment for DS would be better-looking, more fun, and a super-charged version of the original and some would argue that it is, but I find it a tangled mess of terrible controlls and an array of crappy mini games(not to mention you feel like your on an ice level the entire game).
Even with this said the game isn't all bad it still has some of the things that made Mario 64 great like hours of gameplay and a huge cast of colorful enemies and bosses. Plus it also has a few new areas to play through.
Multiplayer is a mess unless you like to play find the star and if your lucky land a hit on someone else and take his or hers.
Alright enough said overall you should avoid this one or if you must, buy the cheaper N64 version if you cant live without Mario.