Kyle gets an elephant, but his parents won't let him keep it because it is too big. Mr. Garrison gives a lecture on genetic engineering, which gives Kyle the idea of making a pot-bellied elephant by splicing the genes of his elephant with a pot bellied pig. Terrence bets that he can clone a human before Kyle can make his animal. Kyle and the boys go to the South Park Genetic Engineering Ranch, where they meet a Mephesto. Mephesto takes some blood from Stan, which Terrence uses to make a clone. Chef tells the boys that in order to make a pot-bellied elephant, the elephant would have to make love to a pig. The boys get the animals drunk, and the deed is done, but the Stan clone, starts wreaking havoc on South Park.