Earthworm Jim was just an ordinary earthworm engaging in normal worm activities, such as eating dirt, crawling, and fleeing from hungry birds, until one day wherein fate should happen to smile upon him and 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 spaceship 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's wormy flesh and caused him to grow and evolve at a fantastic rate. Upon discovering his new-found 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.
Below are the characters on the site that cosplayers have depicted.