Hi
CreeperWithStyle and welcome to Smogon!
Firstly, you do not need to make a whole new thread for this topic, you could instead ask in the
Simple Questions thread or in the general
Doubles Discussion thread.
Second, and not to be too much of a party pooper but personally I would be a
little suspicious of the legitimacy of that Latias, I mean who just sends out perfect shinies with tutor moves over Wonder Trade?
Thirdly, to me that set looks a little gimmicky but could work if pulled off successfully. Like you said there may not be anything on the opposing side that you could cripple effectively with a Choice Specs, special attackers are quite popular due to the amount of Intimidate support going around, and also Mega Stones can not be Tricked away either. If you happen to be in that situation then you are basically locked into Draco Meteor, which after one use pretty much makes Latias dead weight. You also can't fully make use of Latias' support moves if you can not get rid of its Specs, meaning no Tailwind or Recover.
Because it has all tutor moves which can't be relearned in XY, you need to think hard about which ones you want to keep. I honestly don't see any use for Magic Coat but someone else may come up with something... Tailwind and Icy Wind are redundant on the same set as they are both forms of speed control. I think Icy Wind would be more valuable here because it doesn't get shut down by Taunt and will take a chunk out of things like Garchomp, Salamence etc. without having to resort to Draco Meteor. And of course there's Trick which really only serves the purpose of crippling something, if you want to keep that then I think a Trick + three attacks set is more viable, maybe even two attacks with Recover.
Anyway, since it has a Timid nature I think it would be more suited to a speedy support role, maybe something like:
Latias @ Sitrus Berry
Ability: Levitate
Timid Nature
252 HP / 4 SpA / 252 Spd
- Tailwind / Icy Wind
- Helping Hand
- Draco Meteor / Dragon Pulse
- Psyshock / Protect / Recover
or...
Latias @ Choice Specs
Ability: Levitate
Timid Nature
4 HP / 252 SpA / 252 Spd
- Draco Meteor / Dragon Pulse
- Psyshock
- Thunderbolt / Recover
- Trick
Hope this helped somewhat, I'm not the best doubles battler so hopefully some other users can post their thoughts.