Dr. Crab

Dr. Vladmir Krabokov, better known as Dr. Crab, is the arch enemy of.

History
Dr. Vladmir Krabokov tasked two thugs with setting off a mega-bomb and stealing the test data from Blather Labs. This was the event that turned Claude Kane III into Radioactive Man.

kept going from location to location trying to locate Dr. Crab. When Radioactive Man was trying to find the cause of juvenile delinquency in Zenith City, he was issued a challenge by Dr. Crab, who planned to pull the biggest heist Zenith had ever seen. Radioactive Man figured out the challenge and went to Finger's House of Giant Props, where Dr. Crab planned to melt a giant gold record down. He stunned Radioactive Man with his ray gun and escaped. Radioactive Man later tracked him down with a tip from Dr. Hedrick Hertzmann, who told Radioactive Man that Dr. Crab had an insatiable appetite for seafood cocktail. After a fight, Dr. Crab's ray gun is destroyed and he escapes.

Behind the Laughter
He looks slightly similar to Zoidberg in Futurama.

The Simpsons: Tapped Out
He was the main villain in the event. He encased Radioactive Man inside of the Radioactive Man Statue, but he broke out. He returns in the sequel, event, trying to transform all Springfielders into crabs. After failing he unleashes Pinchy in town to seek revenge for the previous year's defeat. However he is defeated again, with Pinchy dead once again, he joins the town as a permanent resident.