Just tested this out for the first time, but with a slightly different list with a couple of experiments I tossed in. Here are my (rough) notes about the deck...
1. I CAN stand up to Dialga, but it's still a tough match. As I said above, it's a race, for the most part. I can get completely set up by turn 3 with both a Glaceon and a Vileplume in play. Dialga, when it doesn't have its Trainers as a resource, has to rely upon topdecking for the most part. It's pretty even in the speed category. If I can get a T2 Glaceon with T2 Plume, they have very few options.
2. Flower Shop Girl is amazing here. It gets me back an entire KO'd Glaceon LvX. In fact, I realized that, with only 100 HP, I need to have at least two of the things in here.
3. 8 Water is enough for this deck. I was playing with 4 Calls and 2 Warps as well. I'll try with 7 or 6, but I think 8 will be perfect here.
4. 2-1 Uxie is plenty.
5. Unown Q isn't necessary, but it helps.
6. Volkner is a dead draw.
7. This deck needs to have 4 Trainers. I'm thinking 1 Lux, 2 Comm, 1 Premier.
8. The better the deck I'm playing, the more devastating this deck becomes. I love eating LuxChomps ^_^.
Here's what I've got right now...
Pokemon (21):
4 Spiritomb
3 Eevee MD62
2 Glaceon MD5
2 Glaceon LvX
2 Oddish LA 112
2 Gloom LA Psychic
2 Vileplume UD
2 Uxie LA
1 Uxie LvX
1 Azelf LA
Trainers (25):
3 PONT
3 Copycat
2 Cynthia's Feelings
3 POV
4 Bebe
1 Lux Ball
2 Communication
1 Premier
4 BTS
2 Flower Shop Girl
Energy (14):
4 Call
2 Warp
8 Water
I'll probably end up dropping down to 7 or 6 Waters with more practice, adding in another POV and the Unown Q to free retreat my Glaceon when necessary.