This is the right place to search for things no manual talks about or to listen to some rumor that are not proven (yet).
Additionally this page lists just funny things someone thinks about in a malfunctioning brain after playing hours and hours Punch-Out!! on the Nintendo Entertainment System. You have been warned...
 

A. Dwarf Sandman:
There is a minor bug in the game`s software that enables Little Mac to reduce the impressive extend of one of his opponents. By hitting Mr. Sandman in the stomach in a special way and timing routine Little Mac produces putt situations of hitting and getting hit simultaneously. Keep doing this routine will cause Little Mac run out of energy and he will go down. But at the same time Mr. Sandman will be reduced to a dwarf. Click here if you don´t believe!
If you are without any fear you should keep Mac down on the mat to see what will happen when Dwarf Sandman will win by KO!

B. Power Walking
Rumor has it that Mac will get tougher when you press A and B button according to Mac`s jogging steps during the N.Y. training sequences. This might even help to survive Super Macho Man`s Super Spin Punches...

C. New York power failure
Sometimes during the training sequences the graphics get mesed up, have you seen that ??? It might be one of the countless power failures in the N.Y. electrical system... (what the hell is "baby boom" in that context?)

D. How Punch-Out prevented WWIII
In the deepest dungeons of world wide web I once found a top secret article about how this boxing game prevented WWIII: It was an interview with George Bush (sen.) and Saddam Hussein of Iraq speaking of some secret NES competition between the two Heads of State. They agreed to the statement that the better Punch-Out!! player of them will rule the world without going to war.
Unfortunately the article never told who the winner was. Read on for your own pleasure at http://hcs.harvard.edu/~satirev/old/vol1no3-match.html

E. Quick fingers
Press reset on your NES then try to put in the Mr. Dream Code in the password lane while the music is still playing. If you want to master THE LEGENDARY this should be no problem to you (...I have never seen such finger speed before...)

F. Mike Tyson`s Punch-Out!! cocktail

G. The mysterious Gold Cartridge

H. Punch-Out!! for the N64
Rumor has that Nintendo and Don King are planing the revival of Punch-Out!! at 64-bit...

I. X-Rated: Nude Punch-Out!! Read the review of the hacked rom...click on nude Hippo...

J. Punch-Out!! Fan Fiction - read about Little Mac´s feelings at the beginning of his career