Seeing this piece and the other devil run, I guess you studied a sample from “How to Animate” by Preston Blair; it surely helps a lot for cartoon like animation (very subtle and exagerated in the same time, wich is great for cartoon style).
However, maybe you could have changed the body form a bit, it's very similar to the model whereas the tail seems a bit off; no offense, it still is a nice piece!
Another great in the series! Except for: The tail o.O
How could you initiate the wave at the tailbone but not have the flame go up and down? The motion is supposed to get bigger near the end, not smaller!
I guess this is hard to get right, but this is so far from it that it can use some work!
@Voltali obscur: Had trouble with the tail whipping upwards as the back feet kick back. tryed to sink it with the feet motion but seemed to have a robot movement effect. Yeah, the how to animate helped alot and feel every one who wants to learn and take a tackle at his how to's; a shot. Definetly will give a better view of how to achieve movement. Taking what I learned and busting some nice animations out and cant wait to finish and post.