Franchise: Wario
Mario Kart Arcade GP DX
Wario Land II
Wario World
WarioWare: Smooth Moves
Bird & Beans
Super Smash Bros. for Wii U
Super Smash Bros. Brawl
Mario Kart 8 Deluxe
Wario Land II
Mario Kart Arcade GP
Game & Wario
Wario's Woods
Mario & Wario
Wario Land: Super Mario Land 3
Mario Sports Mix
Mario Kart 8
WarioWare: Twisted!
Super Smash Bros. Ultimate
Wario Blast: Featuring Bomberman!
Mario Hoops 3-on-3
WarioWare, Inc.: Mega Microgame$!
WarioWare: Get It Together!
WarioWare Gold
WarioWare D.I.Y.
Wario Land 3
WarioWare: Touched!
NES Remix 2
Virtual Boy Wario Land
Wario Land: Shake It!
Wario's Woods
WarioWare: Move It!
Wario Land 4
▲
2
▼

Archive of a Supper Mario Broth post about WarioWorld:
https://twitter.com/AJ_256652/status/1736456383774466136
Forum thread about Wario World's promotional website, showing a screenshot with the URL:
https://warioforums.com/threads/in-search-of-wario-websites.3431/
https://twitter.com/AJ_256652/status/1736456383774466136
Forum thread about Wario World's promotional website, showing a screenshot with the URL:
https://warioforums.com/threads/in-search-of-wario-websites.3431/
subdirectory_arrow_right WarioWare: Move It! (Game), WarioWare (Collection), Wario Land (Collection)
▲
1
▼
In the cutscenes for Kat & Ana's stage in WarioWare: Move It!, Cractus from Wario Land 4 appears. This is the first time a Wario Land character has appeared in the cutscenes of a WarioWare game.
In the Japanese version of Move It!, Cractus has a slightly different name from the Cractus that appeared in Wario Land 4.
The latter game's Cractus was called フラワナ, or Furawana, a pun on "flower" and「罠」(wana, trap). The former that appears in Move It! however is called フラワニ, or Furawani, a pun on "flower" and「鰐」(wani, crocodile). This name change could mean the character was renamed, or the Cractus in Move It! is meant to represent a different individual from the same species.
In the Japanese version of Move It!, Cractus has a slightly different name from the Cractus that appeared in Wario Land 4.
The latter game's Cractus was called フラワナ, or Furawana, a pun on "flower" and「罠」(wana, trap). The former that appears in Move It! however is called フラワニ, or Furawani, a pun on "flower" and「鰐」(wani, crocodile). This name change could mean the character was renamed, or the Cractus in Move It! is meant to represent a different individual from the same species.
Cractus in Move It:
https://www.youtube.com/watch?v=Y-9uY6boLd4#t=24
Move It's English character scroll, confirming that Cractus is in the game:
https://www.youtube.com/watch?v=al3aatW549w#t=562
Move It's Japanese character scroll:
https://www.youtube.com/watch?v=0o1vv47ZO38#t=1314
Wario Land 4 Japanese version Cractus boss fight:
https://www.youtube.com/watch?v=MWClYjpqt6Q#t=183
https://www.youtube.com/watch?v=Y-9uY6boLd4#t=24
Move It's English character scroll, confirming that Cractus is in the game:
https://www.youtube.com/watch?v=al3aatW549w#t=562
Move It's Japanese character scroll:
https://www.youtube.com/watch?v=0o1vv47ZO38#t=1314
Wario Land 4 Japanese version Cractus boss fight:
https://www.youtube.com/watch?v=MWClYjpqt6Q#t=183
▲
1
▼

"Hey! Stop it with the dirty jokes! Is something I should say!! However…since it’s a good question I’m going to answer it! Last night, I put down 10 plates of liver sauteed with leek, 10 crapes, 10 plates of rice curry. My morning poop was very yellow, it was a good color and a big one too! It almost touched the seat of the toilet! I know! The smell is a mix of tsukemono [pickled vegetables], raw eggs, carassius sushi. Try smelling it!"
Up until Brawl's release, Wario had not been associated with vulgar humor that much within actual games, and the only glimpses US audiences would've received of Wario's slobbish side in marketing would have been in animated commercials where he was animated to have saliva dripping out of his mouth (something that could be easily disregarded given that Nintendo used gross-out gags to market most of their titles in the US at the time, even for less edgy characters such as Kirby and Yoshi) and - by an extreme stretch - a subplot in WarioWare: Touched! revolving around Wario's bad oral hygiene. Following Brawl, farting would be cemented as one of Wario's signature abilities in a variety of Mario games.
In-depth article about Wario's farts:
https://sourcegaming.info/2015/08/11/wariofart1/
Commercials:
https://www.youtube.com/watch?v=O79qvR8c6wE
https://sourcegaming.info/2015/08/11/wariofart1/
Commercials:
https://www.youtube.com/watch?v=O79qvR8c6wE
▲
1
▼
In an interview, the game's director and designer Hiroji Kiyotake was asked what the idea behind Wario's creation was. He responded: "We imagined Wario as the Bluto to Mario’s Popeye. The truth is, we kind of came up with the idea of the name first, and everything else came after. Since he was a “warui” (bad) guy, he should be Wario. And we had the idea to flip the M upside down. To our surprise, the idea was a big hit with everyone on the team."
▲
1
▼

The comic "Super Mario: Die Verwandlung" (which translates to Super Mario: The Transformation) shows Wario merging from Mario as a result of a procedure by Dr. Light to cure Mario from his pixelation.
The comic "Mario vs. Wario" shows that during youth, Mario and Wario, when playing together, would often result in Wario getting either hurt or humiliated, believing Mario to be the cause for his bad luck.
The second comic, "Warios Weihnachtsmärchen" (which translates to Wario's Christmas Tale), a parody of A Christmas Carol, shows a flashback of Wario and Mario as babies building sandcastles but because Wario was mean to everybody, Mario would receive all the attention. Also during a graduation ball, Wario wanted to dance with Peach, Princess Toadstool, however because Mario was much nicer to her she instead danced with him.
While all these comics were officially licensed, they have never been acknowledged by Nintendo. Wario has however appeared as a baby in Yoshi's Island DS.
▲
1
▼
WarioWare, Inc.: Mega Microgame$! (and by extension, the WarioWare sub-series as a whole) evolved out of the Sound Bomber mode in Mario Artist: Polygon Studio, which pitted the player in various rapid-fire minigames incorporating their 3D models. Several developers at Nintendo R&D1 grew fond of the mode and decided to flesh it out into a full game. According to Yoshio Sakamoto in a 2006 interview, the decision to rebrand it as a Wario spinoff came about because "we couldn't think of anyone else who would be best for the role. Wario is always doing stupid things and is really idiotic, so we thought him and the rest of the characters would be best for the game." The project was initially worked on in secret, but was immediately (albeit flatly) greenlit once the developers revealed it to their manager.
As a remnant of this inspiration, the microgames "Crazy Cars", "Diamond Dig", "Repellion", "Wario Whirled", "Batter Up", "Mario Paint: Fly Swatter", "Hectic Highway", "Racing 112", and "Maze Daze" are all directly based on Sound Bomber's minigames. Additionally, the boombox interstitial that appears between microgames in certain modes is a modified version of the one from Sound Bomber.
As a remnant of this inspiration, the microgames "Crazy Cars", "Diamond Dig", "Repellion", "Wario Whirled", "Batter Up", "Mario Paint: Fly Swatter", "Hectic Highway", "Racing 112", and "Maze Daze" are all directly based on Sound Bomber's minigames. Additionally, the boombox interstitial that appears between microgames in certain modes is a modified version of the one from Sound Bomber.
DidYouKnowGaming video:
https://www.youtube.com/watch?v=XOKa2GXiCgw
Interview with Nintendo R&D1:
https://games.kikizo.com/features/ncl_nintendo_wwiv_apr06_p2.asp
Comparison between the Sound Bomber microgames and their WarioWare counterparts:
https://www.youtube.com/watch?v=dkD5LOMvdow
https://www.youtube.com/watch?v=XOKa2GXiCgw
Interview with Nintendo R&D1:
https://games.kikizo.com/features/ncl_nintendo_wwiv_apr06_p2.asp
Comparison between the Sound Bomber microgames and their WarioWare counterparts:
https://www.youtube.com/watch?v=dkD5LOMvdow
▲
1
▼
It's easy to assume that Wario's name was based on turning the M in Mario's name upside down, but this isn't entirely the case. The Japanese word for 'bad' is 'warui', so Wario is actually a shortened version of 'Warui Mario' (Bad Mario). This is also the case for Waluigi (Bad Luigi), and works even better in Japan, where his name is pronounced 'Waruigi'.