- Tiny the T-Rex from Meet the Robinsons (Appearing as a Generic video game Dinosaur in Game Central Station, heavily playing the role of Sauron from Primal Rage)
- Vladimir from Tangled
- Maximus from Tangled
- Mickey Mouse on a Double U Dee's (WD's) billboard located behind Litwak's Arcade and Family Fun Center.
- One of the game portals in Game Central Station reads "TRON".
- Bolt on a "lost dog" flyer in Pac-Man.
- A Star Wars Arcade game can be seen in the wide view of Litwak's Arcade.
- Darth Vader's breathing can be heard while Ralph is evading the Doughnut Police.
- Bowser from Super Mario Bros.
- A Super Mushroom from Super Mario Bros.
- Ducks from Duck Hunt (as obstacles in Fix-it Felix Jr.)
- An NES controller as the vault to Sugar Rush's CPU room.
- (debatable): Princess Daisy from Super Mario Land
- (debatable): Princess Zelda from The Legend of Zelda
(Note: Mario and Luigi, the protagonists of Super Mario Bros. were intended to have appeared in the film, voiced by Charles Martinet. However, the producers couldn't find a place to work them into the story, that felt right for their significance, along with paying a hefty licensing fee. However, Mario is mentioned by Fix-It Felix in the film.)
- Sonic the Hedgehog from Sonic the Hedgehog
- Dr. Ivo "Eggman" Robotnik from Sonic the Hedgehog
- Miles "Tails" Prower from Sonic the Hedgehog 2 (Picture on a wall in Tapper's Bar.)
- Amy Rose from Sonic the Hedgehog CD (on the arcade cabinet of Sonic the Fighters alongside some other Sonic characters; her younger self from Sonic CD is used)
- Knuckles the Echidna from Sonic the Hedgehog 3 & Knuckles (on the arcade cabinet of Sonic the Fighters and when Vanellope tell Ralph to "bust it open, Knuckles" (debatable))
- Bean the Dynamite from Sonic the Fighters (on the arcade cabinet of Sonic the Fighters)
- Bark the Polar Bear from Sonic the Fighters (on the arcade cabinet of Sonic the Fighters)
- Fang the Sniper from Sonic & Tails 2/Sonic Triple Trouble (on the arcade cabinet of Sonic the Fighters)
- Neff from Altered Beast
- Cyril the Zombie from House of the Dead
- Mishaela from Shining Force Gaiden: Final Conflict (refered to as the Sorceress by the developers as they didn't know what her name was)
- Saw-Hand Cyborg from Cyborg Justice
- (debatable): Hornet from Daytona USA
- Ken Masters from Street Fighter
- Ryu from Street Fighter
- M. Bison (Vega) from Street Fighter II
- Zangief from Street Fighter II
- Chun-Li from Street Fighter II
- Cammy from Super Street Fighter II
- Blanka from Street Fighter II
- Beholder from Eye of the Beholder
(Note: Dr. Wily from Mega Man was originally set to make an appearance in the Bad-Anon villains support group as shown in an early render image. However, he was cut in the final version of the film and replaced with M. Bison.)
- Kano from Mortal Kombat (aka "Cyborg")
- Paperboy from Paperboy
- Bartender from Root Beer Tapper
- Cowboys from Root Beer Tapper
- Smoke from Mortal Kombat
- Satan from Satan's Hollow, (referred as "Satine")
- Clyde from Pac-Man
- Pac-Man from Pac-Man (depicted here as resembling his in-game sprite rather than his official Namco artwork, which looks like this)
- Inky Ghost Monster from Pac-Man
- Blinky Ghost Monster from Pac-Man
- Pinky Ghost Monster from Pac-Man
- Taizo from Dig Dug
- A Pooka from Dig Dug
- A Fygar from Dig Dug
- Ms. Pac-Man from Ms. Pac-Man (appears on a restroom sign when Ralph is exiting the labyrinth.)
- Frogger from Frogger
- Turtles from Frogger
- Yuni from Dance Dance Revolution
- Leonardo from Teenage Mutant Ninja Turtles (on the Teenage Mutant Ninja Turtles arcade cabinet during the wide view of Litwak's arcade)
- An Exclamation point (!) from Metal Gear
- Paddle 1 and Paddle 2 from Pong
- Charley Chuck from Food Fight (on the Food Fight arcade cabinet during the wide view of Litwak's arcade)
- A racer from RoadBlasters
- (debatable): Bentley Bear from Crystal Castles
- Dirk the Daring from Dragon's Lair (briefly on the Dragon's Lair arcade screen during the wide view of Litwak's arcade)
- Peter Pepper from BurgerTime
- Knight and Ostrich from Joust
- Beard Papa the Japanese cream-puff store brand mascot (as the Sugar Rush candy-kart factory security guard, voiced by John DiMaggio)
- Skrillex as the DJ at the Fix-it Felix Jr. 30th anniversary party.
- Peter Pan from Peter Pan (one of the Nicelanders is dressed as him at Fix-it Felix Jr. 30th anniversary party.)
- A caricature of Director Rich Moore (seen behind Ralph in Tapper's).
- In the scene where Sargent Calhoun and Fix-It Felix are in Sugar Rush, they land themselves in a river of Nesquik Sand, made entirely of over-concentrated Nestle Nesquik.
- In the same scene, they must pull themselves out using Laffy Taffy.
- In one of the scenes that takes place in Litwak's Arcade and Family Fun Center near the beginning of the film, a soda with a cup that reads Subway is shown on-screen on an arcade game.
- One of the arcade games in Litwak's Arcade is Undead Apocalypse, made by either Crosman or Airsoft.
Games Featured/Homaged During End Credits
- Stage 1 from Q*bert
- Chemical Plant Zone from Sonic the Hedgehog 2 (with the Flame Mobile boss from Sonic the Hedgehog 3)
- An 8-bit version of House of the Dead
- A "Hero's Duty" cutscene referencing Metal Gear Solid
- A "Sugar-Rush" version of Adventure Island
- A 3-D "Hero's Duty" level themed after Doom or Castle Wolfenstein
- Root Beer Tapper
- The car-breaking bonus stage round from Street Fighter II
- An 8-bit version of "Hero's Duty" referencing both Metroid and Super Mario Bros.
Mentions and Allusions
- Mario from Super Mario Bros. (by Felix at the Party)
- Lara Croft from Tomb Raider (Used by Wreck-It Ralph as a false name when trying to get past Surge Protector)
- GLaDOS from Portal (Used as a nickname by Vanellope to Ralph referring to "stepping out of his comfort zone"; incorrectly pronounced as "Gladys")
- Aerith from Final Fantasy VII (Referenced and written in graffiti as Aerith Lives on a subway wall in Game Central Station)
- Sheng Long from the Street Fighter series (his name appears as a graffiti at the portal leading to Sugar Rush)
- Leeroy Jenkins (Shown as graffiti on the Terminal Wall as "Leeroy" and later "Jenkins")
- Zero Wing (Referenced in graffiti on the Terminal Wall as All your base are belong to us)
- (debatable): Darth Vader's breathing (When Ralph breathing through a straw cookie in the chocolate lake)
(Note: The GLaDOS reference has been debated, but Valve has acknowledged and confirmed the reference.)
Characters: Wreck-It Ralph | Vanellope von Schweetz | Fix-It Felix, Jr. | Sergeant Calhoun | King Candy | Sour Bill | Taffyta Muttonfudge | Wynchel and Duncan | Gene | Nicelanders | Cy-Bugs | General Hologram | Mr. Litwak | Moppet Girl | Candlehead | Rancis Fluggerbutter | Jubileena Bing-Bing | Sugar Rush Racers | Sugar Rush Citizens | Surge Protector | Hero's Duty Troops | Cameo Characters