Does anyone know where the third easter egg in Nintendo Nightmare is at?
You get the third and final easter egg by "killing" the final boss with a cheat, actually destroying its object instance in the room.
You can get to the final boss quickly by typing this cheat:
room_goto(229)
Once inside the boss room, type this command in the cheat textbox:with(obj_chucknorris) instance_destroy()
This will destroy all instances (in this case, one) of obj_chucknorris in the room, then the game will display the final easter egg text.
