I actually have a skeleton already
and a WIP large Skeleton 
What exactly are you making? I like character design for Metroidvanias.
Hey Imonk, sorry for extremely late reply.... I did'nt check itch.io for long time..... because I thought I will also learn pixel art and I am learning it...... I like your pixel art... Maybe you can help me in my pixel art for our games.... I am making a beat 'em up game and I am making the player sprite.... I would need your help to improve it.... Do you have a discord account, we can talk on discord.
As much as I enjoy being a pixel artist, when it's client work I will be charging a small fee per asset. You might want to consider that first. I usually charge around 10-20 for most simple sprites but it also depends on how much animation there is. Larger tasks such as environments have to be negotiated and broken down into smaller steps before I set a price. Just letting you know ahead of time. I'm always willing to cooperate with the artwork if it needs revision though so you will get what you ask for.
On the other hand, If you're just wanting to learn to do your own art for your games though, I highly encourage that and can try to teach you.
Ummm, I was looking for someone who could work with me for free in starting, when our game would start fetching money, I could pay but for now I can't pay.... I guess I will learn pixel art for my own art.... If you can help me then pls tell that how can I improve this sprite....
(Except adding colours,which I will do later...)
Idle
Run
PunchIdle - His waist isn't shifting up and down, and I'm not sure why his left arm is sticking out.
Run - His core (center) is moving left and right, which is generally supposed to be the programming that does the job. Also I think his head is bobbing way too much.
Punch - Lacking anticipation/ wind-up.
I'll demonstrate it later.