Plopper

Plopper the Pig (aka Spider-Pig or Harry Plopper) is Homer's pet pig from The Simpsons Movie. http://i242.photobucket.com/albums/ff168/Zilla_88/HarryPlopper.gif

Role in the Movie
He is 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 clothing shouldn't be killed). Although Marge wanted Homer to get rid of the pig because a warning seemingly craze Abe Simpson had of "twisted tail" being one of the signs being trapped forever, but Homer kept the pig. Homer then plays with Spider-Pig, particularly making it seem like he is crawling on the ceiling (which the pig didn't like) 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. He then renames him Harry Plopper to spoof Harry Potter. Homer drops his silo of droppings in Lake Springfield. This causes the lake's water to become mutagenic, leading to Springfield getting covered by a dome and an angry mob going after the Simpsons. He fulfilled part of Grampa Simpson's prophetic vision because of his twisted tail.

Disappearance
When the Simpsons escape Springfield, Chief Wiggum shoots that the sinkhole The Simpsons escaped from and the house gets sucked by it and it is believed that Plopper possibly died. However, the release of the DVD shows an a slightly alternate ending, where Plopper 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 18," and later appears in canon in "All About Lisa," which insinuates that the events of The Simpsons Movie actually happened.

Popularity
The popularity of 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.

Other Appearances
In Treehouse of Horror XVIII, Plopper is dropped on Homer by Bart. He appears in the promotional image for Apocalypse Cow. He appears on the cover of Simpsons Comics #141 and made a brief appearance in All About Lisa. On the altered opening episode, Plopper makes an apperance in the opening. Simpsons Comics #149 revolves around Plopper, who Krusty is looking for. Homer again changes his name, to Ploptimus Prime and Wonder Pig.