Welp time for some actual proof that the leaked images are fake.
I made some simple trajectory based lines based on the placement of objects on the screen, and it's pretty apparent this is a phony. That or this Pokemon game is a visual nightmare. First of all, on the bottom left, you see the three lines. They all start from the very tip of the pokeball. One extends perfectly straight, one follows the "straight" of the angle (what would be straight if the angle where rotated,) and the last from the tip to the other ball. As you can see, it's very slightly off.
Example 2: Kerning & Linespace. Look at the top left's green circle, where it says "Greninja." Notice the abnormally large gab between n and j. This is called improper kerning, and it's probably a result of the "leaker" attempting to angle the letters up properly, so he's kerning by hand. Bad choice. You'll also see that if you followed the bottom of the letters, the G dips far lower on the line than any other letter.
I could point out more, but I think y'all get the gist.