At the character selection screen, hold L and press A, C-Down, C-Right, C-Up, C-Left, B.

At the character selection screen, hold L and press C-Up, C-Right, C-Left, C-Down, B,
A(2). If you entered the code correctly, the screen will flash. Press B to exit, then
enter the options menu. Choose the "Secret Options" selection to access different body
sizes, voices, backgrounds, camera flights, claytality timer settings, and camera control
using controller four.