well its been well over 6 months but I used to make quite a few signatures and Pokémon sprite modifications you can find more on my dA: https://unstoppable44151.deviantart.com/gallery/ if you like something feel free to ask,Ill just modify the font and give it to you
Not sure what I can add that I haven't said. These sigs have stuck with me from the very start m8. I still look back at them for inspiration like in this piece: Totally wasn't inspired by that dank Luxray u got. But ye, this is who got me into tagging folks!
moving the lighting to behind the c4ds and focusing them in small parts rather than those 3 big blobs will have a much better effect here imo plus you forgot to burn the luxray's legs-their color seems weird there+kinda out of picture with how dark its surroundings are love the composition and sharpening though a few more gradient maps will help too