Actually I think you can! I've heard that if you get stuck, you can watch the game get past that part for you. I'm not joking!
True. Once you die like 8 times on one level, it gives you the option to watch Luigi play through the level. You can then 'jump in' and take over to finish the level. It won't help you find hidden coins but it'll help you get past a tricky part.
But really, where's the fun in that? IMO if you don't die 15 times on at least a few levels, you're not really playing.
