Fanboy and Chum Chum learn about a secret club in Galaxy Hills and do whatever they can to locate it./The boys create clones of themselves so they can go on a field trip to the thermometer factory.

“Fanboy and Chum Chum,” which premieres tonight on Nickelodeon before taking up its regular post Saturday morning, is a cartoon about two kids who live in a permanent state of playing. They dress as ...