You will Watch Scooby Doo! Mystery Incorporated 109 online for free episodes with HQ / high quality. Stream cartoons Scooby Doo! Mystery Incorporated Episode 9 Battle of the Humungonauts.Two giant monsters, named Humongonauts by Sheriff Stone, are attacking Crystal Cove. Each Humongonaut attacks properties the other brother insures to gain money and revenge against each other for abandoning the other from the circus. Meanwhile, Scooby stumbles across Velma and Shaggy kissing, and discovers their relationship. Shaggy gets into a dilemma when Velma and Scooby fight over who he likes better, and he is forced to decide. Fred decides that the gang should have a name, “Mystery Incorporated”, in honor of those that came before them. Unfortunately he also decides that the gang should start wearing team uniforms. Once again Mr. E. intervenes to help the gang solve the mystery.