How about Super Nintendo for the iPhone?

http://www.youtube.com/watch?v=GclyPtqgcTA

also see
Snes4iphone Running Donkey Kong 2
http://www.youtube.com/watch?v=VijK6QzCJMM&feature=related

and
snes4iphone [PRE-RELEASE]  IMHO stupid use of Rap which is Crap
http://www.youtube.com/watch?v=3tjNkcJ4au8&eurl=http://www.intomobile.com/2008/0
1/23/snes-emulator-coming-to-iphone-ipod-touch.html

Well?
How about Super Nintendo? Do I hear yes? If that's the case you'll be
glad to know the SNES emulator is about to hit iPhone, iPod Touch -
big time!

It's still in beta and currently it's not available for all of us.
Still, if you're eager to be one of the first ones that will take the
"SNES experience" with you, feel free to join the forums and donate a
few bucks. Afterwards, you're ready to go. Forget that, even if you'll
be using the application later -- when the final version rolls out --
you should still donate. It doesn't cost much and helps the developer
continue doing his thing.