Rainbow Power - Spike

Alright, I know Luna won my poll and I'm working on a design for her currently, but I honestly really wanted to draw Spike.  I've ignored him far too long and he deserves more art.

So here's my Rainbow Power take on Spike.  I haven't seen any other designs yet, so I thought I'd give it a shot.
Also I wanted to enter him into the Rainbow Power Contest going on here: fav.me/d7oqgha

No download as his background still must be updated and such to match the others.  

As always I hope that you enjoy and please let me know what you think.  :3

Other Rainbow Power designs: 
Applejack: fav.me/d7pz9ou
Fluttershy: fav.me/d7mlswt
Pinkie Pie: fav.me/d7mjll6
Rainbow Dash: fav.me/d7n12ab
Rarity: fav.me/d7mvtxf
Twilight Sparkle: fav.me/d7p0j94
Vinyl Scratch: fav.me/d7npflq