I am getting close to complete with my Red Baron Fighter Plane design. Here's an updated and colored version of the scourge of the Unova skies:
I got rid of the iron crosses, because although they looked very cool, they just didn't fit with the idea of markings on a Pokemon. I changed the patterns to circles that are vaguely reminiscent of bullseyes or possibly even pokeballs. I got the idea by looking at pictures of one of the most famous triplanes of all time, the
Sopwith, which had the British RAF roundels on the wings. I think the circles are overall a better choice for the design. They are simple, they have an interesting historical reference, the bulleye look supports the general idea of fighting and combat, and since they are basically spots, they can be plausibly present on the "skin" of this Pokemon. I'm pretty happy with how they turned out.
I have a lot more background on this pokemon, based on the idea that it is a "Red Baron of the Unova skies". This pokemon is the final evolution of a line that has a biplane pre-evo, with normal coloring much like the Sopwith pic linked above. These pokemon fly in big squadrons, but each squadron can have only one fully evolved "Red Baron". Some squadrons have none. The only way a pre-evo "Sopwith" pokemon can evolve into a Red Baron, is to defeat another squadron's Red Baron in aerial combat. I imagine the pokemon would learn the move Aerial Ace, which would be the evolution move for this pokemon (like how Mamoswine evolves on the move Ancientpower, for example). This move signifies that the pokemon is now the ultimate in flying combat -- the move Aerial Ace always hits in combat, and for this evolution it signifies that its aerial dogfighting prowess has advanced to the point where it "can't miss" when targeting an opponent. Thus the pokemon evolves, gets the signature red coloring, and becomes the Red Baron of its own squadron.
I've got some more background material, and support sketches. I'll post that later. Hope you like how this one is turning out. I'm having a lot of fun with it!