List of cameos in Wreck-It Ralph

Focused around video game characters, Wreck-It Ralph features numerous video game characters from multiple publishing companies alongside the film's cast of original characters, similar to the 1988 film Who Framed Roger Rabbit.

Disney

 * 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
 * (arguable) 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.
 * Hal (the roach) from Wall-E.

LucasArts

 * A Star Wars Arcade game can be seen in the wide view of Litwak's Arcade.

Nintendo

 * Bowser (King Koopa) 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 (actually a generic princess) from Super Mario Land
 * (debatable): Various turtle characters resembling Koopa Troopas (depicted here as resembling their in-game sprites rather than their official artwork).
 * (debatable): Princess Zelda from The Legend of Zelda
 * Kat & Ana from WarioWare: Mega Microgame$!

(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. However, Mario is mentioned by Fix-It Felix in the film.)

Sega

 * Sonic The Hedgehog from Sonic the Hedgehog
 * Dr. Robotnik (Eggman) 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)
 * the Chameleon Espio the Chameleon from Knuckles' Chaotix/Chaotix (on the arcade cabinet of Sonic the Fighters)
 * Neff from Altered Beast
 * Cyril the Zombie from House of the Dead
 * Saw-Hand Cyborg from Cyborg Justice
 * Angel kids from Angel Kids
 * (debatable): Hornet from Daytona USA (on an arcade cabinet titled Finish Line)

Capcom

 * 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
 * Sissel from Ghost Trick: Phantom Detective (debatable)

(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 Smoke from Mortal Kombat.)

Midway

 * Kano from Mortal Kombat (aka "Cyborg")
 * Noob Saibot from Mortal Kombat
 * Smoke from Mortal Kombat
 * Paperboy from Paperboy
 * Tapper from Root Beer Tapper
 * Cowboys from Root Beer Tapper
 * Satan from Satan's Hollow, (referred as "Satine")

Namco Bandai

 * 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.)

Gottlieb

 * Q*bert from Q*bert
 * Coily from Q*bert
 * Slick from Q*bert
 * Sam from Q*bert
 * Ugg from Q*bert

Konami

 * Frogger from Frogger
 * Glen the Turtle 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
 * (debatable) Basketball Players, consisting of: The Boston Frogs, the New York Eagles, the Chicago Oxes, and the Los Angeles Breakers from Double Dribble

Atari

 * 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

Taito

 * An Alien Invader from Space Invaders (on a picture)
 * The Qix from Qix (as strobelights at the party)

Cinematronics

 * Dirk the Daring from Dragon's Lair (briefly on the Dragon's Lair arcade screen during the wide view of Litwak's arcade)

Data East

 * Peter Pepper from BurgerTime

Williams Electronics

 * Knight and Ostrich from Joust

Square Enix

 * Two moogles from Final Fantasy

Other

 * 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.
 * A graffiti of Sora's crown necklace from Disney's own Kingdom Hearts.

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
 * 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)
 * 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 of "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.)