Ricky the Rat was an unseen character from the Eddsworld Comics, he was put in Tom's room as a prank from Edd and Matt, but they never found him and was free to roam the room. In a comic latter when Tom was injured in an car accident Edd and Matt argue who will get Tom's room, Matt brings up the point Ricky is still in the room. It was mentioned in the description that Ricky was dead, as well as revealing his name.