I have a question regarding Challenge Mode. My brother has it unlocked on his Black 2, and I want to start my White 2 with it activated. Should/can I do this before I actually start a new file (my game is untouched), or do I have to start a new game and quickly save/turn off to activate Challenge Mode (ala Memory Link)? I don't want to start my White 2 and send the keys over only to find out Challenge Mode doesn't work.
It's what I did!