I'm not into PPG, but looking at the three, it's "Ok". The shading color for their outfit, hair, ribbon, and skin should be darkned. It looks flatter from a 100% view. You might wanna add a shading color to these three's socks. And give better shading to Bubble's face. It look weird and seems like Buttercup and Blossom need shading on their skin.
Very cool