If you end up getting a DS of your own we can try out the multiplayer game, which actually doesn't sound all that interesting... basically seems to be Super Smash Bros. fought inside Mario 64 levels.

I was about to say that the DS-specific additions seem like an afterthought but that's clearly not true with the character-switching element, which succeeds in feeling integral to the whole single-player game. I actually assumed that the N64 version had that feature too until I read the Mario 64 Wikipedia article last night, heh heh.