thanks for Mew! Hope you like shiny Umbreon. Shes special. In GTS I wanted a female Umbreon(very hard to get female) and I traded my shiny Espeon. Next time I looked I had a shiny Japanese female Umbreon. O_O
No problem. EV training does have an effect on the Pokemon, no matter what level, though. I have a level 41 Golem with a 252 atk/ 252 def/ 6 hp spread and it's stats are 127/130/148/52/67/49. So depending on the Pokemon it can be good or bad. Try experimenting with different teams, though. I am just getting into competitive battling and have learned a lot just from watching.
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.