Earthworm Jim is a video game character, the protagonist of the Earthworm Jim video games and animated series. For most of his life Jim was just an ordinary earthworm until one day his life was changed forever. A fearsome bounty hunter named Psy-Crow was en route to deliver the "Ultra-high-tech-indestructible-super-space-cyber-suit" to Queen Slug-For-A-Butt but got in a confrontation with another space ship and lost the suit out of an airlock. The suit fell to earth landing on a farm somewhere in the southern United States. While fleeing from a flock of hungry crows Jim took refuge in the mysterious suit. The suit's powerful atomic particles affected Jim causing him to grow and evolve at a fantastic rate. Upon discovering his newfound powers granted by the suit, he overhears Psy-Crow talking to Queen Slug-For-A-Butt, and becomes interested in meeting the queen's twin sister, Princess What's-Her-Name, setting up the events of the first game.
In M.U.G.E.N, there were 4 Earthworm Jim's made. 2 of them were either for the SNES or the Sega Genesis. There are also 2 Clayfighter versions of Jim, made by DrKelexo and Basara-kun. One SNES version is poorly made and has off hitboxes, while the Clayfighter versions are very similar.
This Earthworm Jim char is a six button character that uses the sprites from the Sega Genesis and Super Nintendo games. This version is a beta, said to be v 0.7 in the read me. This explains the lack of moves. He can use his gun, but it drains a bit of his power. His Level 3 Super, Big Barn Gun, it's a full screen unblockable, but it also damages Jim.
This version of Earthworm Jim uses sprites and gameplay from ClayFighter 63⅓. It plays very similarly to the way he fought in that game, with the same moves, except with a couple changes, like adding a backdash and changing the command for the "Whoa Nelly!" attack. He even has the Killer Instinct style combo system that he had in ClayFighter 63⅓. The creator could not add in claytalities though.
This Earthworm Jim moves much faster than Dr Kelexo's Earthworm Jim and uses differently ripped sprites. His "Whoa Nelly!" attack uses the same command from the source game. Also he implemented Juano16's MK system to make one of his Claytalities from the game.