Monster Sprites for someone's project

I'm working on sprites for this person's Pokemon-esque game on another forum. These three are starter monsters. Instead of going with a Grass VS Fire VS Water theme, I decided on Nature VS Technology VS Magic theme for them. The first one is a porcupine, the second is a raccoon, and the third is an opossum.

I'm showing them here for tips. I looked up a tutorial on shading and looked at several Pokemon sprites and tried to make sprites in a style different to that of Pokemon. Do they look alright?

Also, an alternate pallet for the opossum. Which looks better?