But Cephalava is taxonomic butchery. :P
In terms of really standout submissions, I'd list:
Brimscone - It's a brilliant Pokemon-sounding pun, it gives the creature a real sense of hellfire at the same time as a sense of fun, which is really impressive.
Escarglow - It borders on being too obvious, but it's also completely charming.
Fryanide - It's a great submission, but I just suspect it would suit a slightly more brutal-looking Fire/Poison type than the one we have here.
I've personally found it extremely difficult to come up with anything good to submit, so won't be entering. The quality of most names submitted has been, by and large, pretty low so far. This is a huge challenge, the fire and poison words we have don't fit each other easily or elegantly. I don't love the names above because they are puns, that's coincidence. I love them because they are witty and have direct and easy-to-discern symbolic links - they are among the very few that don't look like a bunch of words scrunched uncomfortably together, and I include my attempts in this latter category. This is a real tough one. Huge respect for the three submissions above. One of them is likely to get my full backing.