Haha, I've been inching a Petilil along in W2 because I wanted it to learn Leaf Storm. Now that I have it (Lv.46, and trust me, the battles - including Audino - get tougher for evolvable Pokémon that don't evolve), I am noticing I need a Sun Stone. I have Pokémon to import from Black (I am not wasting time searching for a Pansage/Pansear/Panpour at Lostlorn Forest), so I can import then with missing Stones and an extra Sun Stone or two (since I only have one thus far in W2; I actually clone Pokémon holding my stones to get more, so I have a virtually limitless supply of them).
And yes, I have them all. My Black Pokédex is 649/649. My last acquisition was a Japanese Meloetta, and only because I got tired of waiting for a North America one. I'll likely wait for that one before using it anywhere or doing the Relic Song event at Castelia. I have to still replace some of the trades with ones I've caught (that way I know where they came from and I know there's nothing amiss), but I have a completed Pokédex and the ability to breed literally anything at all that's breedable (even Phione)...though I can't breed Ditto (no one can).
Heehee, nice! I have them all, so if you get it down to the last couple or so, send me a shout. Also, Shaymin's IVs aren't really a problem NEway; in most cases, it can't be used (Battle Subway for instance bans its use, as I think does Wifi, though you can use it in some PWT tournaments in B2/W2).
Also, I edited my prior VM with a link to Froslass's Bulbapedia page and tips on when to evolve Snorunt to that. There are moves only Snorunt learns; you can always use a Heart Scale to get Froslass's earlier moves later, but you can't ever relearn Snorunt's upon evolution. This goes typically for any stone evolution; if you were to try reteaching a Starmie a move, you'll find not much you can teach it.
I appreciate all your concern in the IVs and the EVs, but for right now, I'm not extremely concerned with those :) I'm currently focusing on getting one of every Pokemon -- thanks to you, I now have 481 out of the 649.
Sorry I couldn't do better with its defensive IVs; this one was traded to me, too, and that's exactly how I got it (including those 5 EVs already in there). I hope to eventually get playing Platinum (working on W2 ATM). I will be hacking Oak's Letter into that game and attempting to catch my own Shaymin, but I'll have to do the battle with Action Replay on so I can check the IVs upon capture (if it sucks, I'll have to repeat the battle).
Enjoy the Shaymin. And the eventual Froslass. Don't evolve it, BTW, until you have all the moves you want from Snorunt; Froslass can't learn all of them! Crunch at Lv.31 is the last unique move that Snorunt can learn that Froslass cannot, so after that you can evolve freely. You can always use a Heart Scale to get any missed move in Froslass's levelup chain (see her page at Bulbapedia).