I tried the add cheat from the guide below but it doesn't work, when I re-enters, the cheat list simply turn blank and nothing to choose from. (can still back and still have the cheat introductions)
http://www.drastic-ds.com/viewtopic.php?f=7&t=288
I used the action replay code for marking to change ability... is it might because this cheat isn't compatible or something? is there other ways to get pokemon with hidden ability when playing drastic?