NHL Breakaway '99
At the Main Menu, press C-Left, C-Right, C-Left, C-Right, R, R. Enter this before entering any other code.
At the Main Menu, press C-Left, C-Left, C-Right, C-Right, C-Left, C-Left, C-Right, C-Right, R, R.
Enter the name grEEn jeLLo at the 'Create Player' screen.
At the Team Selection Screen, quickly press C-Up, L, C-Left. You'll hear a sound to confirm entry.
Thanks to Revolution readers Hubert, Joe Weirather, and Sean Garrett!