Thanks guys, here's the update:

I managed to get natu's body better, and get it more readable and keeping true to natu's look.
Edited everyone else so shading feels proper, and edited diglett's dirt to look less boring and make it's face also more readable. Cherubi I also did the same with it's leaf and shading.
Budew I tried to edit, I really don't want to edit the face more than this, have tried multiple ways but out of all of them this is the best imo, budew's eyes are naturally curved, so it wouldn't look much like budew without it, hopefully this new one is somewhat more readable than before. I also gave them an outline that isn't 100% black.
Thanks for the help, they look much better now.