Wreck it Ralph#1

When Litwak's Family Fun Center & Arcade closes at night, the various video game characters leave their normal in-game roles and socialize in a power strip. Wreck-It Ralph, the antagonist of the game Fix-It Felix Jr., is ostracized by its other characters for just doing his job, while the titular hero Felix is praised and rewarded medals for protecting the inhabitants from Ralph. Tired of being mistreated, Ralph announces at the game's thirtieth anniversary party that he will earn his neighbors' respect by winning a medal.

Ralph learns he can obtain a medal from the first-person shooter, Hero's Duty. After disrupting a game session, Ralph scales the game's central beacon and obtains a medal, only to hatch a Cy-Bug, one of the game's monsters, which can adapt to other environments and incorporate the artifacts that it devours from those places into its body. Ralph and the Cy-Bug stumble into an escape pod, which is launched out of the game, and crash land in Sugar Rush, a candy-themed kart racing game.

With Ralph missing, his game is labelled as malfunctioning and faces being unplugged. Felix, upon learning from Q*bert that Ralph has left his game, ventures to Hero's Duty and allies with the game's heroine, Sergeant Calhoun, to retrieve Ralph and the Cy-Bug. Felix explains to Calhoun that he fears Ralph has "gone Turbo", an idiom the arcade inhabitants use in reference to a racer named "Turbo" who abandoned his auto-racing game and attempted to take over a more popular title, glitching them and resulting in both being unplugged.

A little girl, Vanellope von Schweetz, steals Ralph's medal to buy her way into the nightly race to determine which characters players can choose as their avatar. King Candy, the ruler of Sugar Rush, forbids her from racing because she has glitches that cause her to teleport erratically. Ralph and Vanellope agree to work together to retrieve his medal and help her win a race. They build a kart and hide out at Diet Cola Mountain, an unfinished race track, where Ralph teaches her to drive. King Candy hacks the game's code to obtain Ralph's medal, and offers it to Ralph in exchange for preventing Vanellope from racing. He claims that if Vanellope wins and becomes playable, her glitches will be brought to the attention of players and Sugar Rush will be unplugged; the glitched Vanellope cannot leave her game, and she will be left to die while King Candy and his subjects become homeless in the arcade. Ralph reluctantly agrees and destroys Vanellope's kart. On returning to his own game, which has been evacuated in anticipation of it being unplugged the next morning, he notices Vanellope's image on the side of the Sugar Rush cabinet and realizes she was meant to be a playable character.

Meanwhile, Felix and Calhoun search Sugar Rush for Ralph. Felix falls in love with Calhoun, but she abandons him when he inadvertently reminds her of her late fiancé. Felix is later imprisoned in King Candy's castle, but Ralph frees him and Vanellope, and Felix fixes the kart. Calhoun discovers a swarm of Cy-Bug eggs underground, which hatch and start devouring the game.

Vanellope participates in the race, but is attacked by King Candy. Vanellope's glitch reveals he is actually Turbo, who took over Sugar Rush, displacing Vanellope as the main character. Ralph, Felix, and Calhoun evacuate the game, but Vanellope is trapped due to her glitches. When Calhoun points out that the Cy-Bugs can be attracted and destroyed by a beacon of light as in Hero's Duty, Ralph decides to make Diet Cola Mountain erupt to replicate it. During his attempts Ralph is confronted by Turbo, now fused with the Cy-Bug that devoured him. Ralph makes the mountain erupt and falls into its depths, but Vanellope saves him using her glitch. The volcanic beacon destroys the Cy-Bugs and Turbo.

Vanellope crosses the finish line, rebooting Sugar Rush and restoring her status and memory as Princess Vanellope, the main character of the game. Ralph and Felix return home and their game is spared. Felix and Calhoun marry, Vanellope gains popularity as a playable character due to her teleporting glitch, and a content Ralph gains respect from his fellow characters.