Codes
 
 
Enter the following in the enter code menu at the bonus content menu.
Password                                        Effect
Swampfire, Gwen, Kevin, Ben All Combos
Ben, Swampfire, Gwen, Big Chill Infinite Aliens
Kevin, Big Chill, Swampfire, Kevin Invincibility
Gwen, Kevin, Big Chill, Gwen Level Lord