Speaking of recoloured Pokémon, I always thought Shadow Lugia from Pokémon XD was the cooooolest thing ever. There's something about his aesthetic that I just really love. As a kid I used to imagine what other legendaries would look like if they were given the "XD" treatment. Particularly Mewtwo...
The eyes were my first time doing something other than simply recolouring an existing texture. To replicate the look of Shadow Lugia's eyes, I created a circle, adjusted the size and shape, and applied some blur/glowy filters to it. I think it turned out pretty nicely.
Due to the way the game handles bright colours, the harsh red causes the eyes to "glow" somewhat, which is cool. In the future I may update this to use proper emission textures, but it seemed pretty complicated when I looked into it, so I kept things simple for now.