Offering recolors, basic splices, transparency, and small edits!
Samples (of doom):
Edit: removed Paul sprite because it kept making people think I do custom Trainer sprites (I don't; I just made that one for myself one time when I was bored and wanted to practice shading and stuff). I removed it because I realized it seemed like false advertising even though "custom trainer sprites" is clearly not in the list of stuff I do at the top of this post. So, sorry about the confusion. It's still in my banner, though.
Let's see how this goes, shall we? ^^;
To be honest, at first I was afraid I wouldn't be good enough, or have enough time, but I've gotten over that and am all ready to go!
Soon I'll update my signature with a link to this thread rather than a link to my sprite shop at PokeEvolution, and then...well, yeah.