I suppose I should rate these three pokemon individually since they don't seem to be super connected in this piece
The purple tailed one on the left looks cute, I like the portrayed emotion and energetic sitting
4/5
The braixen in the middle feels off somehow. It's likely the face, the perspective feels wrong. Otherwise, solidly drawn
3/5
The posing, expression, and bits of gold fit the vaporeon on the right so well! Your art-style works perfectly for that sass and sharp energy
5/5
So, averaging it out, 4/5. Good job