- Actor Allusion: Toru Okawa voiced Ryu back in 3rd Strike, then was cast as Gouken in IV. Gouken has access to the Shin Shoryuken and Denjin Hadouken as Ultras, both of which were previously used by Ryu as Super Arts in III.
- Ascended Fanon:
- Gouken exists entirely because of fans clamoring for years for Capcom to make a real "Sheng Long."
- Guile's dead combat buddy from the Street Fighter Alpha games, known as Charlie internationally and Nash in Japan, has been addressed by fans under the combination full name "Charlie Nash". Thanks to his dogtags seen in Guile's intro video in IV, that full name is now confirmed as canon. It was probably done out of convenience, to avoid having to draw two different versions of the same scene with a different name on the dog tag, and UDON's comics used the "Nash" surname prior to Capcom making it official (as did The Legend of Chun-Li film around the same time), but still. Bottom line: Street Fighter fandom, you're welcome.
- Fan Nickname:
- Hey, It's That Voice!: IV has this by the truckload.
- The announcer for Super IV is Jamieson Price (Jelly Jiggler and Iron Tager) Later he would also be an announcer in Mortal Kombat 9.
- Jason Liebrecht (Train Heartnet) is the English voice of Abel.
- Dave Mallow (Amarao) voices Akuma, and Oni in AE, both in English.
Taketora is the Japanese voice of both of them.
- Bob Carter (Bojack) voices Balrog.
- Caitlin Glass (Winry Rockbell) voices Cammy in English.
Miyuki Sawashiro is her Japanese voice.
- Laura Bailey (Lust) voices Chun-Li in English.
Fumiko Orikasa (Rukia Kuchiki) is her Japanese voice actress.
- Michael T. Coleman voices Cody, giving him a neutral-sounding accent, dipping occasionally into a more Brooklyn-sounding accent, as evidenced with his intro and some of his attacks (i.e. "Criminal Uppa!").
- Michelle Ruff (Rukia Kuchiki, Arcueid and Yoko Littner) voices C. Viper in English.
Mie Sonozaki (Sode no Shirayuki) is her Japanese seiyuu.
- Toshiyuki Kusuda (Soki) voices Dan in Japanese.
- Daisuke Egawa voices Dhalsim in Japanese.
- Stuart Mc Lean voices Dudley in English.
- Yoshikazu Nagano voices E. Honda in Japanese.
- Travis Willingham (Roy Mustang) voices Guile in English.
Hiroki Yasumoto is his Japanese VA.
- Tsuguo Mogami voices Guy in Japanese.
- Kat Steel (Princess Peach) voices Ibuki in English.
Ayumi Fujimura voices her in Japanese.
- Jessica Straus (Sasha) voices Juri in English.
Eri Kitamura (Vulcanus, Sayaka Miki and her witch form Oktavia von Seckendorff, Roxie, Karen Araragi...) voices her in Japanese.
- Reuben Langdon (Dante) voices Ken in English.
Yuji Kishi (Kyousuke Jinnai/Red Racer) is his Japanese voice.
- Norio Wakamoto (Emperor Charles zi Britannia and Chiyo-chichi) voices M. Bison in Japanese.
- Akeno Watanabe voices Rose in Japanese.
- Chris Kent (The Emperor) voices Rufus in English.
- Kyle Hebert (Son Gohan) voices Ryu (and Evil Ryu) in English.
Hiroki Takahashi is the Japanese voice actor of both of them.
- Misato Fukuen voices Sakura in Japanese. Also overlaps with Casting Gag, since it's not the first time she's voiced someone wearing a Sailor Fuku before...
- Akio Ohtsuka (Xehanort, Solid Snake) voices Seth in Japanese.
His English voice actor is Michael McConnohie (The Lich King).
- David Vincent (Grimmjow Jaegerjaquez and Jin Kisaragi) voices T. Hawk in English.
- Doug Erholtz (Gin Ichimaru, Terumi Yuuki) voices Vega in English.
Junichi Suwabe is his Japanese voice.
- Todd Haberkorn and Johnny Yong Bosch voices Yun and Yang in English. For their cameo in Chun-Li's prologue in the non-AE games, Ted Sroka (the voice of Dan in English) voiced both of them.
- Anthony Landor (Golbez) voices Zangief in English.
Kenta Miyake is his Japanese voice.
- Matthew Mercer (Tygra and Chrom) voices Fei Long in English.
Yuuichi Nakamura is his Japanese voice. Meaning he's a pretty pretty Princess ~
- Meme Acknowledgment: At Comic-Con 2011, a panel featuring the voice directors for Ultimate Marvel vs. Capcom 3 had Taliesin Jaffe (the English VA for Blanka and Adon in Street Fighter IV) belting out "Would anybody like...SOME POUND CAKE?!" and "JAGUAR SLEEPOVER!" The former is a meme originating from one of Egoraptor's sketches from the Street Fighter Collab on Newgrounds and the latter is an oft-quoted Mondegreen of Adon's Jaguar Revolver Ultra in IV.
- The Other Darrin: The Japanese version of IV has all characters recast for some reason, except Bison, Blanka, Ken, Makoto, Yun, and Yang.
- Relationship Voice Actor:
- Hugo, T. Hawk, Chun-Li, C. Viper, Vega/Claw, Guile and the announcer are Ragna the Bloodedge, Jin Kisaragi, Platinum The Trinity, Carl Clover, Hazama, Relius Clover and Iron Tager.
- Ibuki, Fei Long and Ryu are Princess Peach, Ganondorf and Wario.
- Cammy, Chun-Li, Yun and Guile are Winry Rockbell, Lust, Ling Yao and Roy Mustang.
- Rufus, Vega, AE!Yang and Zangief are The Emperor, Squall Leonhart, Firion and Golbez.
- Balrog, Ryu and Rolento are Bojack, Adult Gohan and Cell.
- M. Bison, Seth, Fei-Long, Balrog, Hugo, Poison and the announcer went on to voice Jax, Kano/Ermac, Stryker, Shao Kahn/Baraka, Scorpion, Kitana/Mileena and Noob Saibot. Funnily enough, Price does also voicework as an announcer in MK9.
- Ultra adds Poison and Hugo, who are Bayonetta and Enzo. Additionally, M.Bison is Father Balder and C.Viper is Jeanne.
- Gen and Akuma are Squatt and Baboo.
- Yang, Chun-li and Ryu are Emil Castagnier, Marta Lualdi and Richter Abend.
- Ken, Yang, Hugo, Chun-Li, Guile, Fei-Long, Poison, Seth, Gen, Ibuki and Dhalsim are Date Masamune, Sanada Yukimura, Chosokabe Motochika, Oichi, Katakura Kojiro, Maeda Keiji, Saika Magoichi, Takeda Shingen, Otani Yoshitsugu, Tsurihime and Azai Nagamasa.
- Ken and Yang are Dante and Nero.
- Chun-Li, Makoto, El Fuerte, Poison, Dudley, Hugo, Zangief, and Blanka/Adon/The English voice director are young!Integra Hellsing/Schrödinger, teenage!Walter C. Dornez, the Cheddar Priest/Enrico Maxwell, Heinkel Wolfe, Sir Penwood, Luke Valentine, Spirit of the Harkonnen, and Lief/the English voice director. Including the first anime Sagat is also Incognito.
- Shrug of God: The Arcade Edition and the game's staff are insisting in every way possible the ambiguity of Oni's identity, he who basically all fandom has accepted as a new Super Mode for Akuma, but the in game material still says otherwise: the character is just named Oni, all of his available quotes so far bears almost no connection to Akuma aside from their power-hungry nature, his fighting stance resembles Gouken's more than anyone else, his face has minor differences compared to Akuma's (notably the nose), and the already leaked ending is even more dull than Akuma's as one cannot tell anything about the character by just watching it (well, except the fact he can destroy volcanos with a single punch and possess flight abilities); still it is safe to say that the logical conclusion is that Oni indeed is Akuma. Word Of God finally confirmed Oni as Akuma via Seth Killian.
- Talking to Himself: In English, Blanka shares a VA with Adon in Super.
- Trolling Creator: Yoshinori Ono openly admits to being this. For example, Decapre's Introduction video quickly gets the fandom's hopes up and swiftly dashes them, with R. Mika standing up to Bison and vowing to defeat him, only for her to be easily blasted away.
- Vaporware: For many years after Street Fighter III, the idea of another Street Fighter game was seen as a joke. But when it was announced...
- What Could Have Been:
- Abel was originally conceived as a skinny, Bishōnen Judo-ka, that was intended as "a character who could be mistaken for a girl."
- Originally, Rufus was named "Cobra King," and was a lean muscular black man wearing a stylish karate gi◊. He was still planned to be acrobatic fighter, but employed a fusion of breakdancing and kung-fu (breakung-fu) instead of his self-taught kung-fu. Marketing research on the preferences of American gamers had a big hand in Cobra King's design.
Then, SF4's art director suggested that Cobra King should be made overweight. The series of changes after that led to Cobra King becoming Rufus. According to SF4's producer, they used Rufus' current look because it would "freak people out," and because "over-the-top" characters sets Street Fighter apart from the other fighting game franchises.
The gi would later be used as an alternate outfit for Ken.
- T. Hawk and Dee Jay were originally going to be in vanilla IV. Both of them joined the roster with the release of Super.
- R. Mika, Karin, and Elena were considered for Super. Series Producer Yoshinori Ono said that if DLC characters are released, R. Mika will be among the first. In fact, Elena barely missed the final roster for Super Street Fighter IV.
- Ono also mentioned that he wanted Final Fight's Rolento in the mix as well.
- And now with Ultra Street Fighter IV coming along, Elena and Rolento are finally playable characters.
- Concept art shows that Guy's alternate outfit in IV was planned to be Strider Hiryu.
- As detailed under Never Trust a Trailer on the main page, more characters would have received a second Rival as opposed to just six (Ryu, Chun-Li, Guile, Cammy, C. Viper, Seth):
- Ken: Sakura
- E. Honda: Adon
- Blanka: Dan
- Balrog (Boxer): Cody
- Vega (Claw): Cammy
- M. Bison (Dictator): Cammy
- Rufus: Ryu
- El Fuerte: Guy
- Abel: Juri
- Akuma: Gen
- Gouken: Ken
- Fei Long: Gen
- Sakura: Cammy
- Rose: M. Bison
- Gen: Guy
- Dan: Sagat
- Guy: M. Bison
- Additionally, Cody's Rival was originally slated to be Chun-Li, as seen in the SSFIV trailer. Considering that Cody's an escaped convict/vigilante and Chun-Li is an Interpol agent, as well as factoring in their respective win quotes for each other, it makes sense; later in development, Cody's Rival was changed to Guy, his old Final Fight brother-in-arms and SFA3 sub-boss (which also makes sense, albeit for more personal reasons as opposed to merely being on opposite sides of the law). The trailer also featured locales different than the final build for all of the new characters' Rival Battles.