South Park Season 1, Episode 5: An Elephant Makes Love to a Pig

Shelley has been beating up Stan and he does not know what to do. Kyle to decide to crossbreed his pet elephant with Cartman’s pot-bellied pig, Fluffy, to make little "pot-bellied elephants". Terrance bets Kyle that he can clone a whole person before Kyle can get a pot-bellied elephant. The boy's visit Dr. Mephisto's ranch, showing them his genetically engineered collection. Mephisto steals a blood sample from Stan and he and his assistant create a clone of Stan for Terrance (Mephisto’s son)'s science project.