Metal Sonic from Sonic the Hedgehog for the Super Mugen Bros project.
By Shazzo the Hedgehog.

Origin:
Well, after getting into Mugen recently, I instantly desired to make my own character. However,
since I didn't have Photoshop or Paint Shop Pro, & Fighter Factory was a foreign language to me,
I decided I'd start out by editing an existing character. That's when I found CvS Axel by
EasyChar. Then of course there was the palette issue. MakeAct and Pal2act were useless, so I
tried an alternative strategy, using Paint and Photo Express. And it worked! So after
a few hours of editing, I transformed Axel into his current form - Metal Sonic

Why:
Metal Sonic is one of the characters for Super Mugen Bros.

Moves:
Standing
A/X - Punch
B/Y - Punch 2
C/Z - Double-arm punch

Crouching
SMB uses weapon modes rather than crouches. These moves are stronger but take longer to connect.
Metal's weapon mode is an electrical amplification mode.

A/X - Electric punch 1
B/Y - Electric punch 2
C/Z - Electric double-arm punch

Midair
A/X - Punch
B/Y - Small shock
C/Z - Large shock

Specials
Down, down-forward, forward + X/Y/Z - Metal laser
Down, down-back, back + A/B/C - Power charge - Gain power, lose life
Down, down-back, back + X/Y/Z - Electro discharge

Supers
Level 1
Down, down-forward, forward, X+Y - Metal Cannon - Metal Sonic converts his arm into a cannon and
fires a large lase blast.

Level 2
Down, down-forward, forward, A+B - Metal Lightning - Metal Sonic charges up all of his power
and summons a bolt of lightning to surround him. This however deactivates him for a moment.

Sources/Thanks to:
Sprites: A Sprites Database I found on Google, the Spriters' Resource, and the MFZ.
Sound: Sonic Fan Games HQ.
Coding: EasyChar