I cringed at the fact I couldn't critique this with the critique feature But I'll put one in the comments here.
First of all this picture is brilliant, I barely ever get excited over pictures of overused characters such as eeveelutions. But this really caught my eye.
The detail in this picture is great, every line and colour looks as if it was really hard worked on, from the espeons jewel to the umbreons glowing circles looks beautiful. This picture is a real feast for the eyes, everything in it is something to look at. Even the background is interesting.
The only problem I see in this picture, and it really is tiny. Is the pointy metal tag on the Espeons collar, the spikes seem a bit close and odd sized. Maybe I'm too fickle but that is the only part that bothers me.