See, I'm getting into this whole 'art criticism' thingy you've been going on about!
Pyrock, to me at least, looks like a cigar. I like the name, and want to see what it evolves into... according to your DeviantArt page. Posesstone and Oresses look interesting, especially the Psychic demon-thingy coming out of Possestone. I prefer the first name to the second... saying it out loud sounds a little bit weird, to be honest. As for the final two, I like how Eruptot changes from a bomb to a volcano: kinda unexpected, but when you think about it, it begins to make more sense.
Keep it up, I guess!