Nagano Olympic Hockey 98 (N64)

Start with 5 goals:
Enter "goal" as your name and type "givegoals" when you
play the match. Then you get to start the match
with 5 goals.

Constant fights:
Highlight the "Fighting" selection at the options screen. Then, hold L and press C-Right, C-Left, C-Left, C-Right, C-Down, C-Up, C-Up, C-Down, C-Left, C-Right, C-Right, C-Left, C-Right, C-Left.

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.

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.

Select opponent:
When playing against the CPU, highlight the desired opponent on the team selection screen and press C-Right, C-Right, C-Right. This code may not be enabled in Olympic mode.

Forfeit game:
Press Start to pause game play. Then hold L and press C-Left, C-Left, C-Left, C-Left, C-Left, C-Left, C-Left, C-Left, C-Left at the options screen.

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.

Change player appearance:
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)