I don't know whether the vehicle should be original since it says "create" but if existing ones are okay that is a neat one. I can actually see both Stiria and Nix in it. Shiva was actually the best looking summon in Final Fantasy XIII and you've captured them quite well in this :)
I'm not sure this is correct isometrics? The wheels look odd and the back of the bike seem to be tilting.
Great detail and colours.. but the back wheel looks kinda odd..