I was able to beat mario 2 with no prob... I thought I was a fucking pro tell mario 3 came out, that shit was hard as fuck! I think Mario 2 had some of the best characters though... That little head that chases you when you grab the key was a trip.
The Mario wii reminds me a bit of Mario 3, some of those levels are off the chain... yet still easiyer then mario 3 haha.