Access Debug Menu Which Includes...

-Character Select (BATMAN, ROBIN, NIGHTWING, CATWOMEN)

-Level Select  (free roam, boss fights and more)

-Area Select (not sure how that works)

-Movie Select (not sure about this one either)



TO ACTIVATE THE TRAINER DO THIS EITHER INGAME OR IN THE MENU

simply press NUMPAD 0

and if you dont know how to press NUMPAD 0 follow the instructions below.

press the num lock key (to the right of the backspace key) then press 0 (to the right of the right arrow key) and you should be in the debug menu :)