At the Press Start screen enter:
Z, Down, C-Up, C-Left, C-Left, C-Left, C-Left, C-Down.
At Press Start screen enter:
A, R-Button, Left, Right, Down, C-Up, C-Left, C-Down.
At Press Start screen enter:
B, B, R-Button, Up, Left, Down, C-Up, C-Left.
At Press Start screen enter:
L-Button, L-Button, R-Button, Z, Left, Right, C-Up, C-Right.
To skip the long string of advertisements, simply press
the reset button on the N64 on the first screen that shows up (the one
with the white text and black background ). You should see it "fly" towards
the bottom-right hand side of the screen, then it will reapear. Now press
Start at all the screens to skip them.
At the Press Start screen enter:
A, R, Z, Up, Up, C-Up, C-Down, C-Down.