Good games. Haha, I've heard about Cresselia's annoying Twaves, but never actually encountered any (I wasn't sure why... all the Cress i encountered in Spring Friendly had Icy Wind instead). It's cool I got to experience it now.
I was testing it out in Battle Subway, and Twave Gyarados actually worked better than Twave Latias overall, but yeah, the EV spread for this Latias is pretty unique. I won't mind telling you over PM if you're interested, but probably not VM... you know, just in case lol.