Oh WOW where have I been???
You've done a lot so I'll just focus on 3 of them.
The Gastrodon looks great (love that facial expression <3). Because the salt was largely separate from the Gastrodon itself, you were able to focus on drawing a Gastrodon- not a silly (albeit amazing) version of one. And in that you did amazing, the Gastrodon looks just like legitimate Nintendo art! However, my one criticism is that those red bumps aren't what a slug does when you pour salt on it. Haven't you ever done that?
Nonetheless, excellent job! :)
On Glameow, I really like the contrast you made between Glameow's questionable looks and Purugly's ADORABLE looks. It stands out. In addition, adding that mouse in was a nice touch, something that adds to it without being obvious. I have no complaints with the artwork itself, as it's just about perfection, but it looks to me more like Glameow is resentful of Purugly than wanting to evolve.
In any case, you're still doing marvelously wonderful.
Cool approach on the CaPmon, I wouldn't have thought of a panda. I would perhaps give the bamboo sticks a few more leaves, to emphasize the Grass typing more, but you got the Ghost part of the typing just right, IMO. That's all I got.
Yay Ritter!