They look pretty good! I'd recommend incorporating more shading into your works, though. They appear flat currently but a little bit of simple shading would really help their looks a lot. Apart from that, you might want to work a little bit on the body proportions. I'm not an expert, but some of them look a little too long. At least, that's what I think. Hope I helped. :o
they look really good (: way better than i could ever draw. i would work on adding some different shading and making them a little more realistic. i do like your new one you just added because of the variation of color for the flames. nice job. can't wait to see more.
I'll try to incorporate shading more into my drawings, and try to touch up on body proportions. Anyways, here a drawing of one I did shortly after posting this thread.
I drew this before I got any advice, so no shading is involved.
Name is a mix of club and lemur. Pretty much the Rattata of whatever generation this is.