...Don't know, don't care, as we'll most likely never see her or it again.
...On the other hand, we can speculate...
I'd guess Umbreon, simply judging by Eevee's attacks. Does it know an Ice attack? No. Does it know a Grass attack? No. Does it know a Psychic, Water, Fire, or Electric attack? No. Does it know a Dark attack? Not technically, but Shadow Ball fits with Dark better than the others, and with the exception of Dig, all of Eevee's other attacks are mainly Normal-type.
Sure, attacks aren't really an absolute way of telling how a Pokemon will evolve (with the exception of certain D/P pokemon, but that's more of a question of IF it'll evolve), but it can be used as a way of guessing, as that kind of thing invariably has some kind of hidden meaning in it when it comes to animes...