Punch-Out!! for the Wii is an amazing success. The gameplay is solid, with a suite of modes and options that reflect modern day expectations. A holographic practice mode and the option to restart matches ensure that the game's difficulty is kept in check somewhat, letting players fail on their own merits, not due to technical limitations that require things like 10-digit codes to save player progress.
The other modern-day design concession, a two-player mode that pits Little Mac against Little Mac, is probably the least welcome option, as it adds little to the tight Punch-Out!! experience, especially for anyone hardcore enough to play through every single-player aspect of the game. Minor quibbles aside, Punch-Out!! comes highly recommended-if you think you're up to the challenge.