Go to the edit profile command, hold L2 and input the following code:

Mr. Sunshine ... LEFT, LEFT, UP, UP, RIGHT, RIGHT, DOWN, RIGHT.
Vernon ... RIGHT, UP, UP, DOWN, DOWN, RIGHT, RIGHT, RIGHT.

Submitted by Testament McBorgen

Jak ... UP, UP, DOWN, RIGHT, LEFT, DOWN, DOWN, RIGHT

Submitted by almora

All are unverified.