This South Park episode was originally aired on 18th February 1998
Mr. Garrison takes his class on an archaeological dig for arrowheads. Cartman finds a mysterious triangle and the kids get on TV about this important discovery, which captures the attention of Leonard Maltin. He comes to South Park to warn about Barbra Streisand's desire to get the triangle. Barbra Streisand comes to South Park and tries to get the triangle from the kids. Barbra finally get the other triangle and becomes Mecha-Streisand, wreaking havoc upon the town. Maltin tells Chef to call Robert Smith of The Cure to come to the rescue.
Robert Smith's transformation is a parody of Mothra from the Godzilla movies.
South Park Spoiler Alert!
(The complete plot for this South Park Episode)
During an archeological dig, Cartman discovers a mysterious stone triangle, which he promptly throws away in without interest. Shortly after Kyle picks it up, the archeologist guide identifies the writing on the triangle as Anasazi. Kyle appears on television to discuss the find, making a jealous Cartman want the triangle back. Cartman constantly pesters Kyle until he returns the triangle to him. Meanwhile, Leonard Maltin comes to South Park and asks Chef whether he has seen Barbra Streisand. Maltin, who saw Kyle and the triangle on television, tells Chef the boys are in great danger.Later, Streisand finds the boys at the bus stop and demands the "Triangle of Zinthar", and gets aggravated when they reject her. As they search for Streisand, Maltin tells Chef she is seeking the triangle to complete the ancient relic, the "Diamond of Pantheos", which will allow her to become an evil and dangerous creature that could conquer the world. Later, Streisand dons a disguise and visits the boys again, offering them a monetary reward for the triangle. Stan, Kenny and Kyle are suspicious, but Cartman insists they go along for the money. Streisand takes them to her condo in the mountains, where she chains the boys up and tortures them with her singing voice. Cartman relents and gives up the triangle, which he had hidden in his shoe.
Streisand combines the triangle with the diamond, transforming herself into a giant mechanical dinosaur called Mecha-Streisand, and begins to completely destroy South Park. Maltin and Chef arrive to free the boys, and Maltin asks the boys to call The Cure lead singer Robert Smith for help. Maltin then transforms into a giant robot and battles Mecha-Streisand, but he is quickly defeated. The boys evade fiery debris from the fight, but Kenny is killed when he stops to play tetherball and gets strangled by the rope. Actor Sidney Poitier arrives and turns into a giant turtle with fangs to fight Mecha-Striesand, but he too is easily defeated. After getting a call from the boys, Robert Smith arrives and transforms into a giant moth resembling Mothra. After a great battle, Smith punches the Diamond of Pantheos away from Mecha-Streisand, who explodes and dies. The boys split the diamond again to try to prevent anyone else from getting the power, but the episode ends with the boys cowering in the presence of a giant Ike.