Press C-Down + R, C-Left + R or C-Up + R at the options screen. Modify the first six bits of a 16-bit register to change the game be pressing:
C-Down + R (head size, alters bits 1 and 2)
C-Left + R (body size, alters bits 3 and 4)
C-Up + R (announcer's voice, alters bits 5 and 6)
Constant fights
Highlight the "Fighting" selection at the options screen. Then, hold L and press C-Right, C-Left(2), C-Right, C-Down, C-Up(2), C-Down, C-Left, C-Right(2), C-Left, C-Right, C-Left. A line of numbers will appear to confirm correct code entry. A fight will break out at regular intervals during the current period.
Forfeit game
Press Start to pause game play. Then hold L and press C-Left(9) at the options screen. Digit seven of the "Specials" number will turn to 1 to confirm correct code entry. When game play is resumed, your team will be losing 1-0 and the clock will be set to 0:00. Note: This code may have to be entered twice to function correctly.
Multi-player practice mode
Hold A on controllers two, three, and/or four at the title screen. While those buttons are held, use controller one to highlight "Practice" and press A.
On-fire goal
Begin game play in arcade mode. Approach your opponent's goal at an angle with a full turbo meter. Press Shoot + Pass + Turbo to see a fire truck appear.
Push goalie
Begin game play in arcade mode. Approach your opponent's goal directly with a full turbo meter. Press Shoot + Pass + Turbo to push the goalie into the net and score one point.
Quick start
Hold B and press Start at the main menu. The game will start at the face-off screen with Modano (Team USA) under your control.
Register Effect
100000 Stocky Players.
010000 Stocky Players, Big Heads.
110000 Stocky Players, Small Heads.
001000 Small Players, Small Announcer.
000100 Large Players, Large Announcer.
000010 Crunched Players, Small Announcer.
000001 Elongated Players, Large Announcer.
110110 Large Players, Small Heads, Large Announcer
010010 Crunched Players, Large Heads, Small Announcer
010101 Large Players, Large Heads, Large Announcer
010001 Elongated Players, Large Heads, Large Announcer
Select opponent
When playing against the CPU, highlight the desired opponent on the team selection screen and press C-Right(3). The sound of a click will confirm correct code entry. Note: This code may not be enabled in Olympic mode.