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Marvel vs Capcom Fighters
Fighter ID:
Password
Age
Over 1,000,000
Eye Color
Red
Occupation
Lord of Chaos

Games
Marvel Super Heroes
CPS2
Marvel Super Heroes vs Street Fighter
CPS2
Marvel vs Capcom 2
Naomi
From Marvel Comics.
Marvel vs Capcom 3
PlayStation 3
Downloadable content/pre-order bonus character.
Ultimate Marvel vs Capcom 3
PlayStation 3
From Marvel Comics. Downloadable content. Will transfer over for MvC3 players that have already purchased him.

Storyline
Background
Pre History
Shuma-Gorath is a tentacled, cyclopean demon-like being that is well over one million years old. He has attempted to conquer the Earth on multiple occasions.
Marvel vs Capcom
The Heroes' Challenge
The chaos god of destruction arrived from another dimension, prepared to destroy all life on Earth!
Fate of Two Worlds
Shuma-Gorath is an ancient and terrible being who wants to enslave humanity with his supernatural powers and ability to shapeshift.

Fun Facts
Four-color Palette Swap
Shuma's primary color switch from pink in Marvel Super Heroes to green in MSH vs. SF owes to the fact that Marvel never had much of a handle on his color either. Although green is apparently his "correct" color, he has appeared pink in several instances (including his first appearance).
Enough Cross-Canon To Make Your Head Spin
Shuma-Gorath is undoubtedly one of the most peculiar characters in Marvel canon, but his roots (tentacles?) run much deeper than the surface.

Shuma-Gorath is first invoked by name in "The Curse of the Golden Skull", a posthumously published Kull the Conqueror short story by Robert E. Howard. A few years later, the name was used by Marvel Comics for a demonic entity as an adversary of Dr. Strange's.

This would all come full-circle when Shuma Gorath appeared in Marvel Comics' adaptation of another of Howard's creations, Conan the Barbarian.