Megatron is a character from the Transformers series famed for being the leader of the Deceptions, a group of ruthless and evil Transformers with the intention of conquering every planet in the universe. The Autobots and the Decepticons fought against each other in a massive war that tore their homeworld of Cybertron apart. In one continuity, Optimus Prime considered Megatron his brother.
A creator known as Omega Supreme created Megatron for M.U.G.E.N. The design is based on the Megatron from the original series of Transformers, much like the other Transformers chars created by Omega Supreme.
Megatron has a standard A,B,X,Y moveset much like Kung Fu Man; he has a balanced moveset featuring both weaker and powerful moves, including projectiles and melee moves that are similar to what he uses in the Transformers cartoon, one of which being his Fusion Cannon that deals tremendous damage to his opponent. He has the ability to summon some of the other Decepticons as Strikers, including Thundercracker who drops bombs into the opponent. Overall, he is a decent character to play as, other than some of his 'being thrown' sprites are missing.