Similarities between Rat King and Dick Hardly[]
Both are utterly ruthless and heinous scientists, both have manipulated innocent characters with rats and PPG clones, both have been turned into terrifying monsters, and both are cruelly threatening to kill the Ninja Turtles and the Powerpuff Girls.
Similarities with Rat King and J. Geil (JoJo's Bizzare Adventure)[]
Both are archenemies of the Splinter and Jean Pierre Polnareff, both are very sadistic psychopaths.