It must consist of a single Pokemon on a plain white background with no parts of the Pokemon cut off by the canvas.
It looks good except you can't have a background in your final submission. I like the ideas behind them, though you might need to tweak your LC just so it will be more distinct from Kadew's- it's distinct enough to work, but still! It also might be a good idea to splice the evolutionary line together for a comparison between- make sure it flows right and such.
Umbreons: As already said, your newer ones are pretty similar to Aurumoth. I think the idea could be pulled off, though- experiment about a bit and, if possible, maintain their adorability. :3
Kadew, nothing much to say of yours except I second floofing the second's neck. Great designs and great execution!
As for my design-
The first prevo sheds so much fur and particles and whatever else that it can have Shield Dust as an ability. The same general principle was applied to prevo 2, but it's more Shed Fur than Shed Skin- I really don't want to do a cocoon. D:
My critiques on your art will be honest! I'm not mean about it- or at least I don't think I am- but I won't lie to you. As a result, I'll always hide-tag my critiques (don't be nervous because it's hidden!). My praise, however, is also honest, and I'll never give one without the other.