What pillow shading? None of the pokemon sprites are even remotely close to being pillowshaded.
Now, I think the problem here is 1. The sprite's size. The style changes quite a bit when you scale up the sprite. 2. The shading seems to be too high contrast compared to the pokemon sprites. They have one layer of shadow, and no highlight. (The hair sometimes has it, but even that seems to be commonly just two colors)
3. The light in all battle sprites comes from top left, to my experience. Your character has it come from top-front, which deviates from the style. 4. His pose is quite awkward - he seems flyswatted, as his arms are going in two directions without much reason behind them. An option: Extend the left arm, making it look like he is preparing to throw the ball like a pitcher.
However, you need to adjust the rest of his pose as well, as it seems powerless otherwise.
The main point here is to avoid 'mirroring' the pose without reason.

Some doodling since I can't really help with words that good.