Enable NOOB Myukus
Enter SRY3D as password to enable Noobus Myukus(Shadow version of Myukus).

Cheat menu
Enter BVGGY as password to enable Cheat Menu.

Play as Alternate Myukus
Password: B1G4L

Then at the Character Selection Screen you can select the character(s) you put the code in for.

Play as Myukus
Password: N0T3T

Play as Lizzie, George, and Ralph
Password: S4VRS

Play as George and Ralph
Password: SM14N

Play as Ralph
Password: LVPVS

Character Passwords
At the Password Screen enter these codes to get the character listed.