>>49875245While I like that you went out of your way to make a custom UI for the battle screen in your fake, there are two things that stick out.
First, is that the choice of colors for the opponent Level is very amateurish. Since you have no background (not even an opaque one) for the opponent name/level, having the name and level be of opposite colors is honestly jarring, and would not work well on certain backgrounds. You'd have one easily visible, while the other one being hard to read. And pretty much in no situation you'd have both looking good. Also, black text without background tends to just look ugly in general. Notice how they did in PLA (pic related). Same color (white) for both name and level, plus the level has an opaque background to both stylize it, while also making it easy to read no matter what's behind.
Second, unlike to the battle screens we see in the website, the Pokemon in your image seem too close to each other, To be fair, this last point isn't strong enough to decide that it's fake by itself, but it did stick out to me.
The only way I could delude myself into thinking this is real, is if I consider that this could be a picture from early development, before they were done with the battle UI.
But that would be too much coping. The obvious answer is that it's simply fake. Plus, that green bar looks pretty bad.
But cool fakemon design. And well done preparing pictures of it in being seen from more than one angle.