Sid Phillips

Sid Phillips is the main antagonist in Toy Story. He is mentioned by Buzz in Toy Story 2. He also makes a cameo in Toy Story 3. He is the only person who knows toys are alive.

Toy Story
Sid is Andy's evil 10-year-old neighbor (until he moved at the end of the film). Sid was introduced in the beginning of the film as a toy terrorizer when he exploded a Combat Carl with an M-80, with his toy-chewing dog, Scud, by his side. Andy's toys were surprised to see him back at his old habits so soon, assuming he got kicked out of summer camp early this year. Later that day, when Andy and his family went Pizza Planet, Sid was also there. After playing Whack-an-Alien, the Crane Game caught his attention. After grabbing a Alien, a Buzz Lightyear was put in view. He then went after him, getting not only Buzz, but cowboy doll hooked onto his foot as well (Woody tried to save Buzz, but the aliens wouldn't let him).

After skating back home, with his new toys in his backpack, he was immediately greeted by Scud, whom he gave the alien to. Then, seeing his sister Hannah with her Janie Doll, he snatched the toy and ran up to his room, slamming the door in Hannah's face. He then pulled out his Pterodactyl toy as he played doctor for his "double-bypass brain transplant." After putting Pterodactyl's head on Janie Doll's body, he opened up the door and showed Hannah. Scared, she ran off to report to her mother. Sid threw the mutant toy at the ground and ran after her, implying that Hannah was lying. With Sid gone, Woody explored his room to find a way out, but found the door locked and unable to escape. He then discovered that Sid had taken toys apart and assembled them back together in weird combinations.

The next morning, Sid tortured Buzz by spinning him on a drillbit, and then took Woody and threw him across the floor, pretending to interrogate him. Next, he opened up the window shade to let the sun in. He then took out a magnifying glass and focused the hot beam of light on Woody's forehead, until Sid's mom informed him his Pop-Tarts are ready.

Sid returned to his room later, with a rocket he had ordered in the mail, labeled "The Big One." He intended to blow apart one of his toys with the rocket for his own amusement. Initially, he was to blow up that "wimpy cowboy doll," but he couldn't find him (Woody hid under a milkcrate). However, when he stepped on Buzz Lightyear's laser button, which activated the laser light-bulb, he chose to tape the rocket on Buzz, stating that he had always wanted "to blow a spaceman into orbit". Unfortunately for Sid, he was forced to delay the launch due to "adverse weather conditions at the launch site" when a rainstorm hit, giving Woody and Buzz time to reconcile overnight.

At the end of the film, Woody and all of the mutant toys planned a way to extract revenge on Sid and help Buzz before Sid destroyed him with the rocket. The toys all appeared out of nowhere and approached Sid, making him increasingly scared. Woody then told Sid to take care of his toys, because they would know if he did not. After seeing Woody come to life in front of his face, Sid screamed and retreated back into the house, frightened that the toys had come alive. Hannah then took pleasure in scaring her brother even more with her dolls after she discovered how scared he was.

Sid was never seen again as Andy and his toys all moved away, but they never forgot Sid's wicked deeds. Sid's rocket was ultimately utilized by Woody during the move to Andy's new house to help RC, whose batteries had been depleted, back into the moving truck as Woody and Buzz both went skyrocketing, during which Buzz freed himself from the rocket by opening his wings to tear off the tapes that bounded him to the rocket (as for the rocket, it climbed up for a few feet higher before exploding into smithereens).

Toy Story 2
Although Sid did not appear in this film, he was mentioned by Buzz Lightyear, who reminded everyone searching for Woody how Woody didn't give up on him when Sid had him strapped to a rocket.

Monsters, Inc.: Laugh Factory
Sid made guest appearances in issues 3 and 4 of the Monsters, Inc. comic book mini-series, Laugh Factory, as the main antagonist, though his name is never actually given (as the monsters do not bother learning it from him). At the beginning of the third issue, "Toy Worry", he ducks into Boo's bedroom to hide from Sulley and Mike when they're pursuing him. We learn from Sulley and Mike that Sid has been using the monsters' door-traveling technology to break into kids' rooms and steal their toys. Afterwards, Sid escapes with Boo's Jessie doll saying: "HAW HAW! LATER, CHUMPS!!", and Boo follows him into Monsters, Inc. to help Mike and Sulley capture him. Upon being caught and brought to the C.D.A., Sid states that he has been stealing the toys in an attempt to "save" the kids from suffering the same incident he did, but the monsters do not believe him. They have Sid thrown back to his home through Hannah's door.

In the next issue's story, Sid breaks back into Monstropolis and helps Randall and Mr. Waternoose escape from prison. They offer to give him the plans for their door-traveling technology (which Sid plans to get rich off of in his world) in exchange for him helping them get revenge on Sulley and Mike. They manage to capture the heroes along with Celia and Boo (the latter of whom stowed away with Sulley as he was coming back from his last visit with her), but the girls manage to escape back into the human world with Sid and the two villainous monsters pursuing them. Eventually, Celia and Boo manage to find another closet-door back to Monstropolis, where they lead Sid, Randall, and Waternoose into captivity by the C.D.A. At the end, Sid is again sent back home, with the monsters hoping that he has enough of them now. thumb|300px|[[Chatter Telephone explains Sid's cameo in the film.]]

Toy Story 3
Sid (now grown up) made a cameo appearance in Toy Story 3 working on a garbage truck as he comes to pick up the trash from Andy's house (including Andy's toys who were also in a bag and mistakenly got put outside by Ms. Davis, whom Woody hurries out to rescue without being seen). Sid is mostly heard scatting to music and is identified by having the same skull t-shirt that he wore as a kid, along with a yellow vest, goggles, a goatee, and a big set of headphones. He is seen again near the end of the film, after the toys escape from the incinerator at the Tri-County Landfill and hitch a ride on his garbage truck to get home. During his brief re-encounter with him earlier, Woody apparently did not recognize him as being Sid as he was more concerned about saving the others.

Erik von Detten reprised his role as Sid again for the film as an adult, like the way John Morris did as Andy.

Personality
Sid is a young, bratty skate punk with metal braces, whose idea of fun is terrorizing his little sister, Hannah, and destroying toys in many ways (exploding, burning, or in his "mad doctor" plays). Though despite this, he may have a lighter side, hinted in his dreams about ponies.

After his toys turned on him, he vowed never to hurt a toy again. Aside from this, Sid remained mostly the same (especially his love of heavy metal), and eventually became a garbage man.

Trivia

 * Sid also appeared in a Toy Story Treat short Woody's Nightmares. In one of the two nightmares that Woody had, Sid was laughing evilly as he had swapped the heads of Woody and Buzz Lightyear (the similar way he had replaced the Janie Doll's head with the Pterodactyl's).
 * It is said that Sid Phillips is inspired by a former Pixar employee who has been known to disassemble toys and use the parts to build strange creations.