This South Park episode was originally aired on 10th September 1997
In this South Park Episode 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.
Mephisto is revealed in this episode to be a Buddhist.
South Park Spoiler Alert!
(The complete plot for this South Park Episode)
The boys are waiting at the bus stop when Cartman notices Stan has a black eye and it turns out his sister Shelley has been beating him up. Kyle has problems of his own; his mom will not let him keep his new pet elephant in the house. At school, Mr. Hat teaches the class about genetic engineering, which prompts Kyle to decide to crossbreed his elephant with Cartman's pot-bellied pig, Fluffy, to make little "pot-bellied elephants", which he could keep in his house. Upon hearing this, Terrance Mephisto bets Kyle that he can clone a whole person before Kyle can create a pot-bellied elephant. Mr. Garrison suggests the boys use their genetic modifications for the upcoming science fair and check out the South Park Genetic Engineering Ranch.At the ranch, Dr. Mephisto shows them his genetically engineered collection, including several different animals with four pairs of buttocks, such as a monkey, ostrich and mongoose. Mephisto then explains that, just like the Loverboy song says, "pig and elephant DNA just won't splice," and steals a blood sample from Stan and the boys leave. At school the boys learn Terrance has cloned a human foot. The boys go to Chef with their genetic engineering problem, and after he too cites the Loverboy song, he gives them the idea to try to have the animals "make sweet love" to breed.
Meanwhile, back at the ranch, Mephisto and his assistant Kevin have created a human clone of Stan for Terrance. The boys attempt to get the pig and the elephant drunk to mate, but it does not seem to be working until Chef stops by and sings to the animals with a little help from Elton John. The cloned Stan breaks free from Mephisto's ranch and proceeds to terrorize the town. The boys eventually find the clone and take it to Stan's house and convince it to attack Shelley; however, it decides to destroy the house and indirectly kills Kenny, by flinging him into a microwave, with a chair. Mephisto shows up and shoots the clone, but Stan is afraid he will be in trouble for everything the clone did. However, in a brief moment of kindness, Shelley takes the blame, after which she beats up Stan.
When the science projects are due, Terrance presents a monkey with five pairs of buttocks, but Kyle has nothing until the pig gives birth to a pot-bellied pig that looks like Mr. Garrison, implying the pig was impregnated by Mr. Garrison before the elephant. Garrison quickly awards it first prize over Terrance's monkey.