He means that it looks like the Pokemon's only occupying one plane. Try bringing the front leg closest to us down a few pixels maybe?
If you need a more dynamic pose, you could try bringning the legs out and lowering the body, similar to this?
(I just searched "pounce") on Google and this was the only good pose I could find okay)
If you need a more dynamic pose, you could try bringning the legs out and lowering the body, similar to this?
(I just searched "pounce") on Google and this was the only good pose I could find okay)