I took a page from the later Pokémon artbooks when I doodled this demon. He's a lot of fun to draw, especially concerning his finer details!
Concerning Akuma's design, I initially saw in him in a dream[↗], colors and all, so I wasn't expecting him to be blue in the least. However, I liked his design so much that I decided to make him a mainstay when I drafted my (Creative and Original™) paracosm!