This character design is very good. Mega Typhlosion's details look similar to Groudon. When I first look at the character, the reds and browns flow well, but the reds and cyans seem to clash, even though they are opposite of each other. They take a minute to adapt to. Once I became used to the color contrast, I thought higher of this image.
Mega Typhlosion's anatomy is good, but there are some drawbacks. For the black line in between the cyan and tan fur, it appears there is a gap as it reaches down the back of the leg. The rocks on the right leg do not appear natural. One of them has a hard, red line at the bottom of it. The back-left foot is out-of-shape. There is no heal. These fixes should improve the image's vision.
Finally, there is a harsh edge at the bottom-right of the illustration. For a transparent background, this is a deadly error! If a client saw this mistake in the professional graphic design business, I believe this would totally nail you hard in the face! When your character is in a transparent background, your shadow must be smoother and it cannot bleed outside of the art board's edges. You can fix this by increasing the picture's canvas size or decrease the character's size. Do not just think about the positive space. Think about the negative space--your character's surroundings, including his/her shadow's surroundings. How far apart are Mega Typhlosion and his surroundings, which especially involves the edge of the picture?
I've seen a lot of great things on dA over the years but this. THIS is AWESOME. o.o Would it be alright if I used this as my DeviantID profile picture or put it up in my webcam? I'll give you credit. I just really need to see this like. Forever XD (Typhlosion's my fav Pokemon if you couldn't already tell).
major change in look, id say maybe the volcanoes on its back are a bit too much, then again it is the only starter to know volcanic moves, making the simple fire back kinda off putting/ not diff from other fire starters. that and camerupt already has some but who cares. itd be awesome to see those volcanoes as cannons for its moves, like blastoise. cool idea