Miscellaneous[edit]
- If your opponent's health is very low towards the end of round 1, but you haven't knocked him down twice yet, it might be a good idea to avoid knocking him down and waiting to do it at the beginning of round 2. Then you have lots of time to knock him down twice more for a TKO. This strategy is most important against Mr. Sandman, Super Macho Man, and Mike Tyson. Especially Mike. Of course, if you have already knocked him down twice, you may as well knock him down a third time for a round 1 TKO.
- If your opponent gets knocked down and gets up on a count of 1, he will automatically fall down again as soon as you land an uppercut, even on a full life bar. This rule does not apply if the round ends before you knock him down again.
- Every boxer except King Hippo shares a palette swap with exactly one other opponent. This means that their bodies look exactly the same except for the colors and the head, and they use many of the same animation frames. Therefore, a telegraph that applies to one boxer will often apply to the other, although the timing may be different. These are the boxers who share bodies and animations:
- Glass Joe and Don Flamenco
- Von Kaiser and Great Tiger
- Bald Bull and Mr. Sandman
- Soda Popinski and Super Macho Man
- Piston Honda and Mike Tyson/Mr. Dream
- No opponent ever gets up on a count of nine, except the second time you fight Bald Bull, who always gets up on a count of nine.
- Soda Popinski was originally named Vodka Drunkenski in the arcade game Super Punch-Out!!. Strangely, his banter between rounds still suggests drunkenness.
Cheats and passwords[edit]
Health regeneration[edit]
After round 1 or 2, you can press 
while Doc is talking to you. You will see Doc pumping his fist faster. When you start the next round you will regain health. However, if your health meter is full or very close to it, you will lose health instead (this can be done before round 1 to make the match harder). The code can be activated only once per fight. If your health is low but you're otherwise doing well, this trick will regenerate a very large portion of your health. On the other hand, if you took a huge beating and are very close to losing, it will give you a sliver of health at best.
Passwords[edit]
These can be entered at the start screen by going down to continue, and pressing 
or 
to start entering the code and to confirm each number. Use 
and 
to change the numbers.
| Name | Code | Details |
|---|---|---|
| Major Circuit | 005 737 5423 | Major Circuit, with perfect play (Only KO or TKO before, no losses) |
| World Circuit | 777 807 3454 | World Circuit, with perfect play (Only KO or TKO before, no losses) |
| Super Macho Man | 940 861 8538 | 99 wins, 0 losses |
| Piston Honda (rematch) | 032 730 8442 | |
| The Dream Fight | 007 373 5963 | The final match, against Mike Tyson/Mr. Dream; you don't actually get this code from the game |
| Another World Circuit | 135 792 4680 | Hold and press + after entering the code.
|
| Busy signal | 800 422 2602 | Nintendo's old customer service number! |
| See the credits | 106 113 0120 | Hold and press + after entering the code.
|
Another World Circuit is a new way to take on the Major and World Circuit fighters. In one long circuit, you play through the King Hippo and Great Tiger matches, the entire series of World Circuit fighters, and the Dream Fight (with Mike Tyson/Mr. Dream being called "MChampionn"/"Another Champion" - Champion replacing the middle letters of Mike Tyson). If you lose even one fight, it's Game Over. Unfortunately, if you can already beat the World Circuit pretty easily, this will not provide much extra challenge, but it can make the game a little more interesting.