Plopper

"Spider Pig spider pig does whatever a spider pig does"

- Homer singing to Plopper

Harry Plopper (originally Spider-Pig) is Homer's pet pig. Homer first meets Plopper the Pig when he and Bart are in Krusty Burger.

Biography
Plopper was adopted by Homer after he sees him featured in a Krusty Burger commercial filmed live at one of Springfield's Krusty Burger locations when he is about to be killed (he believes that animals wearing people's clothes shouldn't be killed). Although Marge wanted Homer to get rid of the pig because a warning seemingly crazy Abe Simpson had of "twisted tail" being one of the signs being trapped forever, Homer kept the pig. Homer then played with Spider-Pig, particularly making it seem like he is crawling on the ceiling to spoof Spider-Man and leaving pig tracks all over the place. Homer puts his droppings in a giant silo that reads "pig crap" in the back yard. After Marge told Homer to dispose of the waste properly, and said that he could take Spider-Pig with him, Homer corrected her and told her that he renamed Spider-Pig to Harry Plopper, which is a spoof of Harry Potter.

Homer dropped his silo of droppings in Lake Springfield. This caused the lake's water to become mutagenic, leading to Springfield getting covered by a dome and an angry mob going after the Simpsons. Later while the Simpson family was escaping from their house during the mob by walking across a wood board leading to the Flanders' house, Plopper pushed the board making the Simpsons fall from it. He fulfilled part of Grampa Simpson's prophetic vision because of his twisted tail. He was seen being placed as a present from one of Cletus's relitives at Bart and Mary's wedding.

Plopper eventually became so famous, he was put on the Springfield Wall of Fame.

Non-Canon Appearances
At some point he nearly endangered the town again, although this time by somehow causing a nuclear meltdown that would happen in approximately thirty minutes. Just like Trappucino, this also resulted in most of the townsfolk forming an angry mob and trying to kill Homer (as he was technically responsible due to being Plopper's owner). Homer eventually manages to stop the disaster before it could happen. In Simpsons Comics #160, he is seen with Stampy and the Simpson Family on Bart and Lisa's Grandsons' wall and is a main part of the story that parodies "Charlotte's Web" in which he can talk. In Simpsons Comics #168, he is one of the things that frown at Homer as Balder.

Behind the Laughter
The Spider-Pig song gag which parodies the Spider-Man theme is arguably the most remembered and popular scene in the movie. It was featured on many trailers for the film. According to the writing staff, it was one of the latest additions to the film.

When the Simpsons escape Springfield, Chief Wiggum shoots at the sinkhole The Simpsons escaped through and the house gets sucked in and demolished by it and it was believed that Plopper possibly died. However, the release of the DVD shows an a slightly alternate ending, where Plopper is helping out with the reconstruction of a Santa's Little Helper's doghouse, along with the Multi-eyed squirrel and SLH. In addition, he is in the couch gag in He Loves to Fly and He D'ohs- Homer cuddles him and refers to him as his "summer love". He has also made brief cameo appearances in the Heck House segment of "Treehouse of Horror XVIII," and later appears in "All About Lisa" and "Apocalypse Cow".

In a promo for the movie, they had a pig Plopper balloon floating around, but had a sharpshooter in case the pig floated away like one of the Pink Floyd Pigs.

Spider-Pig Song
Spider Pig, Spider Pig,

Does whatever a spider-pig does.

Can he swing from a web?

No, he can't, he's a pig

''Look out! He is a Spider-Pig''