Cross-Series (Various): All of 9-Volt's games are Nintendo games or products: Balloon Fight (NES), Duck Hunt (NES), Game Boy (Portable Game System), Donkey Kong (Arcade), F-Zero (SNES), Family Basic (Famicom keyboard), Super Mario Bros. (NES), Ultra Hand ("Magic Hand" device), Chitorie (Remote-controlled vacuum cleaner), Laser Outlaw (Arcade), Hogan's Alley (NES), Mario Paint: Fly Swatter (SNES; Fly Swatter was a minigame within Mario Paint), Ice Climber (NES), Legend of Zelda (NES), Sheriff (Arcade), Dr. Mario (NES), Racing 112 (Television Video Game), Mario Clash (Virtual Boy), Helmet (Game & Watch), Urban Champion (NES), Stack-Up (NES), Metroid (NES), Wild Gunman (NES), LazerBlazer (SNES), and Ultra Machine (Batting Machine). (Credit: KingTT)
Status: Unverified

Wario World (GCN)

Cross-Series: The first showdown boss looks and acts like Yoshi. She (yes, it is a girl) is green, has a white stomach, and she sticks her large tongue out at you. (Credit: Deven711)
Status: TRUE: (Screenshot) from IGN.com proves it.

Console (Various): Some of the treasures you can get include a Nintendo 64, Game Boy Advance, Gamecube, and an NES. (Credit: Deven711)
Status: Unverified

Wave Race: Blue Storm (GCN)

Cross-Series (1080 Snowboarding): Four of the characters in this game share names with four of the snowboarders in 1080 Snowboarding (N64). (Credit: Mark Kelly)
Status: Unverified

West Bank (C64)

Music (Scott Joplin): The theme tune is a Scott Joplin rag. (Credit: Andy Thorley)
Status: Unverified

Wild 9 (PS1)

Cross-Series (Earthworm Jim): The background music for the Beast Ride stage is the "Use Your Head" music from Earthworm Jim Special Edition. Aside from the Wild 9 version only looping once, the track is identical to the Earthworm Jim Special Edition version. (Credit: Codie Martin)
Status: TRUE: The "Use Your Head" song is Track 10. I'd reccomend going to Zophar's Domain and downloading the Earthworm Jim .rar. The "Use Your Head" is labeled as "Buttville" (oddly, the actual Buttville stage isn't on the .rar file). It doesn't sound exactly like the song on Wild 9, but it's close enough to tell they're related (remember; EWJ:SE remixed the song, then Shiny used the remix in Wild 9).

Programmers: In the ending, when you get a glimpse of the back of Wex's vehicle, his license plate reads "SHINY", the makers of the game. (Credit: CodieMartin)
Status: Unverified

Music (Amazing Grace): Amazing Grace is the Game Over screen's music. (Credit: Codie Martin)
Status: TRUE: For confirmation, pop the disc into a CD player and go to track 14, I believe. Second to last on the disc.

Famous Person/Cross-Series (David Bowie/Earthworm Jim): B'Angus has the David Bowie eyes, like what Earthworm Jim has. I'm not sure if you want to consider this a reference to Earthworm Jim, or David Bowie. I'd go with David Bowie, because that's what EWJ's eyes are based off. Obviously, that's something Shiny really likes to put in their games. (Credit: Codie Martin)
Status: TRUE: (Picture) proves it.

Wild Arms 3 (PS2)

Specific Reference: During the game, you will have the opportunity to collect a series of "Adventure Books" to read to Clive's daughter. A principle character in these stories is Marivel Armitage, from Wild Arms 2, though the plot of the Adventure Books does not in any way reflect the WA2 storyline. (Credit: Devin de Gruyl)
Status: Unverified

Character Cameo: The main character of WA3, Virginia Maxwell, shares her last name with WA1's "Calamity" Jane Maxwell, though the two characters do not appear to be otherwise related. Like Jane, however, Virginia favors dual pistols in combat, so perhaps it could be more than mere coincidence. Interestingly, it is Virginia's rival, Maya Schroedinger, who seems to have inherited Jane's character design! (Credit: Devin de Gruyl)
Status: Unverified

Miscellaneous (Schroedinger's Cat): One of the characters accompanying Maya Schroedinger is a small catlike being known as Shady. At one point in the game, Shady tells of how Maya, as a small child, released him from a box that her father, a "crazy scientist," had placed him in. The implication is that Shady is, in fact, Schroedinger's Cat from the famous thought experiment. (Credit: Devin de Gruyl)
Status: Unverified

Wild Gunman (NES)

Miscellaneous: Don't know if this is a cameo, but Wild Gunman was originally an arcade game that used 16mm film. When the wild gunman's eyes flashed you had to shoot him with a light gun - just like in this game. And yes, the original was by Nintendo. (Credit: Mark Kelly)
Status: Unverified

Wipeout (Multiplatform)

Cross-Series (Various): Psygnosis jumped on the advertising bandwagon by placing billboards for several of their PSX games throughout the game (ex: Krazy Ivan). (Credit: Dire 51)
Status: Unverified

Wonder Dog (Sega CD)

Miscellaneous: This is the oddest cameo yet, imo. I picked up a video cassette cleaner a year or so back and popped it in my VCR to clean it. Who should appear onscreen but Wonder Dog, hero of the obscure first generation Sega CD game Wonder Dog, holding a giant brush! He then proceeded to clean off the entire screen, while a Japanese woman said "When Wonder Dog with stop mark plate appears, push stop button". I guess Wonder Dog's been having a hard time finding work ever since Victor Musical Industries let him go back in '92 after his game tanked. (Credit: Dire 51)
Status: Unverified

Worms Armageddon (PS1)

Cross-Series (Street Fighter 2): The fire punch and dragon ball attacks are a direct take-off of Ken/Ryu's dragon punch and fireball moves in the Street Fighter games. (Credit: Ragnorak-X)
Status: Unverified

Movie (Monty Python & the Holy Grail): One of the weapons, the holy hand grenade, is the exact weapon used to kill the monstrous 'killer rabbit' in "Monty Python and the Holy Grail". (Credit: JediMasterGeo)
Status: Unverified

Wu Tang: Taste the Pain/Wu Tang: Shaolin Style (PS1)

Cross-Series (Thrill Kill): The whole game is just a reskinned version of Thrill Kill only with one or two different finishing moves. (Credit: Andy Thorley)
Status: Unverified

Cross-Series (Thrill Kill): Belladonna from Thrill Kill is a hidden character, though oddly enough, she uses Tormentor's whip, rather than her own cattle prod. (Credit: Andy Thorley)
Status: Unverified

Cross-Series (Final Fantasy 7): There is an option to turn Method Man into a character called "Hystrix" who is a homage to Cloud Strife. He wears a similar outfit and carries the Buster Sword. The only real difference is that Cerith is bald. (Credit: Andy Thorley)
Status: Unverified

Programmers: The faces of some of the game's producers can be seen above/behind their names during the credit sequence. (Credit: Andy Thorley)
Status: Unverified

Products (Sony): After one of his fatalities, Rza will turn to the camera and shout, "Sony digital surround sound!", which is a reference to the speaker system...which is odd, because Sony had no part in the game. (Credit: Andy Thorley)
Status: Unverified

WWF Superstars (Arcade)

Cross-Series (Double Dragon): Billy Lee from Double Dragon can be seen standing near the front of the audience, on both the left AND right sides, for some reason. Both games were made by Technos. (Credit: Andrew Rae)
Status: Unverified