Super Punch-Out!! is the fourth game in the Punch-Out!! series. It's got a total of 16 opponents, both old and new, spread out across four circuits of increasing difficulty. The gameplay is pretty much exactly the same as in previous games, but there are some new features - If you get several succesful hits in a row you can now throw super-strong punches until you take a hit yourself. There is also a time trial mode in which you can practice against any of the opponents you've already fought to get the attack/dodge timing down.
Sadly no other games have been gotten out of the way, but at least you can now prepare for Punch-Out!! on the Wii, which is out in just 2 months!