I saw that you were looking for an EV trained Umbreon, Starmie, and Blissey below level 50 for some championship and thought I would point out something.
Now I am not an expert EV trainer, but I am a pretty competent one. The effects of EVing show up at level 100, with the certain stats being changed to higher than they would without being EV trained. At level 50, these stats would not be at the best they could be for that level, because the training is meant for level 100 battling and it shows up over time. It might work for level 50 battling, but that's just how I view it.