Basement

the characters from Experiments, Happy Tree Friends, Paw Patrol, PowerPuff Girls, WordGirl, Arthur, Scooby-Doo, Team Umizoomi, Carl the Collector, Max & Ruby, Peppa Pig, South Park, Family Guy, Hamster and Gretel, SML so basically Pop is hiding a dark secret which is in his basement Pop tells his son Cub to stay away from the basement and everyone else to stay away from the basement disobey and something bad will happen