Well, I played the game a couple days ago, and after getting frustrated at how poorly designed the game was (I doubt there'll be more of these, thankfully, since this reflects the Japanese promotion and we actually get to influence our result!) I finally got... Jolteon. Well, not what I wanted but I was too frazzled to try again so I just went "whatever" and saved. But then I came back after hearing it hadn't saved for some people. And, lo and behold, it didn't for me either. I switched browsers, played the game again, and managed to get Espeon this time. Espeon's my favorite Eeveelution and has the best ability of them, I think. Umbreon's a close second but Inner Focus just doesn't do it for me.
And since the topic came up, yeah, there are Mossy and Icy Rocks in Unova. You run right by the Mossy Rock while chasing Plasma in the forest, and the Icy Rock is down in the depths of Twist Mountain but can be accessed any season, I believe.