After arcade hours, on the 30th anniversary of the "Fix-it Felix" (Jack McBrayer) video game, villain Wreck-It Ralph (John C. Reilly) just wants a pie, a pat on the back, a medal from the Nicelanders - an impossible change. Fellows at "Bad-Anon" (motto "One game at a time") warn him "going Turbo", taking over another game, gets both games put Out of Order and unplugged.
In new "Hero's Duty", he aims for the top of the tower through alien bugs, but gorgeous "high-definition" Sgt Calhoun (exactly perfectly voiced by Jane Lynch) warns him their only duty is to help "the first-person shooter" get the Hero's Medal.
The escape pod accidentally crashes on colorful (mostly pink) Sugar Rush. His medal hooks atop a candy cane tree. Precocious brat Vanellope von Schweetz (Sarah Silverman) steals in first, wanting the entry fee for King Candy's (Alan Tudyk - last seen in Firefly) race that decides tomorrow's avatars. She's a "glitch" that flickers and nobody wants.
A Cybug stowaway is a consuming virus that threatens everyone. "If you die outside your game, you don't regenerate." Felix's job is to fix Ralph's wreck, and tags along. Meanwhile the Fix-it game is posted Out of Order, in danger of pull-the-plug.
----------Spoilers: King claims that a human who saw Van glitch in a race would report the game as broken. A glitch can never leave their game, so she would die when the plug was pulled.
But Ralph sees her picture on the side of the game, and wants the truth. Van was a racer until King wrecked her code. If she wins, the code resets. King locked away everyone's memory, so they don't know what would happen next.
Extras: Paperman ShortPreviews: The Little Mermaid, Monsters University, Planes