Ah man... Did not know that they don't listen to you. Might become problematic especially since I did want to start new files with Darkrai, Latios, and Electrivite as my powerhouses (trade for them).
Darn, that sucks. Anyways the plates location can probably be looked up on the thread. And the waterfall is on the first floor of Mt. Iris, not the last.
Also Gaia Wings are easy, I beat them with only 1 pokemon also... But you might have a very hard time against the Torxeia League when everyone else is like level 80-95...