Super Punch-Out!!

Codes

2-Players Mode

At the title screen, hold Y + R on controller 2, then press Start on controller 1. You’ll be taken to a special exhibition match mode where you can fight any opponent. Choose an opponent and in the match info screen, hold Y + B on controller 2 then press Start on controller 1. If done right, the 2nd player will be able to control the opponents.

EffectCode
Enter your name in JapaneseHighlight ”New Game” and press X+A.
Have the opponent be controlled by player 2Hold B+Y on 2P controller, and press A or Start on P1
Select any fightHold Y+R on 2P controller, and press A or Start on P1
Sound TestWhen the Nintendo logo appears, hold the L+R buttons on Controller 2. Listen to the sound effects and music with Controller 1.

Game Genie Codes

C2A4 DFD4       Infinite energy from most punches

D9AD DDA4       Both fighters gain max energy after making a hit

C2AB DFDF       Some special attacks don't hurt as much

CB34 AD07       Always have K.O. punch after first hit
F834 AD67 
3C34 ADA7

C9E3 64DD       Infinite match time

DDB7 0704       No rematches

D1B7 0704       Start with 5 rematches

DBB7 0704       Start with 8 rematches

C2B8 64A5       Infinite rematches

DFAB AFDD       Most opponents stay down for the count

49BC 6F6F       Both players start with half energy

DFBC 6F6F       Both players start with very little energy

DB8A D4A1       Start on world circuit
D48A D7D1
3C8A D701