Yeah I can make Zack, I'd just need the basics of personality and a vague idea of what you want him to look like. I had thought you meant that just make a random person and call him Zack, which I don't like.
Pick your favorite gym leader, that's not Blue/Green.
Oh here call me Lornami, I'll be getting my name changed back to that next month.
Or Nia. ;o;
I meant more of a full design. Avatar, signature, profile colors. For that I would need images, or at least a person who has images of them.
And if you meant take a made up sprite and THEN make your OC look like that, I'll maim you.
It's like the people on Gaia who take those generic anime character pictures and say it's what their OC looks like. No no. That's not creative at all.