After wrestlers Bret and Owen Hart are injured at the Szalinskis', Wayne and the Chief agree to take their places in a match, aided by Wayne's remote-controlled bodysuit.

Nick invents a machine of his own in an attempt to resurrect his dead pet bunny, Copernicus. Things go wrong when his invention summons a monstrous creature from another dimension that possesses the body of his deceased friend.

Nick is running from a bunch of bullies when he takes a hard fall and a circus takes him home. The head guy steals everything in Wayne's lab so now the family must rescue Nick and they must do this by joining the circus themselves.