Actually, of all of 'em, I like Primeape the best. ^_^ You've got the stuff, kid. Keep at it!
If I were to offer any advice (let's pretend for a minute that I have the authority and/or permission to do so) I'd suggest sketching them on paper, scanning them in, and then coloring them on your computer. The colors will be so much brighter, and it's much easier to clean up a computer image than it is a colored pencil one. ^_~