Snowboard racer
Enter "BUCKYB" as a name.

Milk truck
Enter "MOOOOO" as a name.

Infinite money
While playing the game, press B, Z(2), B, Up, C-Down, Z, Start on controller two.

Overhead view
While playing the game, press Up(3), A, Left, A(3) on controller two.

Blurred view
While playing the game, press B, Left, Up, Right(3), A, Start(2), Z, Right, A, Up, Z, C-Down, Start on controller two.