I actually have, or at least have had, sometimes for a system which no longer works, pretty much every game in the Street Fighter and King of Fighters series, with the exception of the very most recent King of Fighters games and the HD Remix of Super Street Fighter II Turbo. And the early 3D spinoffs like the Street Fighter EX series and the King of Fighters Maximum Impact titles. I also have all of the Fatal Fury games (again, except the 3D one and some of the platform specific translations). I only have one Darkstalkers game, but it's Darkstalkers 3, so it's the most complete, and it makes obsolete both of the previous titles.
Sadly, the death of my old original Xbox system made some of my games no longer playable (the Capcom Collections had Street Fighter and all of the Street Fighter 2 titles), but let me go through what I have just for the sake of posterity and to keep my own mind straight for each of these series. I'm not trying to suggest that these are the only games of this genre that I have, but I am suggesting that I deliberately won't be drawing any material from anything other than what's on this list. For the sake of my own sanity; I'm aleady working with too much potential source material as it is. As a matter of nitpickiness; some titles I have more than one copy of; in that case, I'm only indicating the most recent system that I have it on. In some cases, those are systems that no longer work, but I'm still listing them because I played the game a ton on that system when I had it working.
I've added an asterisk after a title that most particularly will probably be mined for material.
SNES
- Super Street Fighter II (Don't know why this one was missed in the Capcom Classics Collection noted below, so this is actually the only system I had this particular iteration on.)
Playstation
- King of Fighters '99*
- Darkstalkers 3*
- Capcom vs SNK Pro
Dreamcast
- Fatal Fury: Mark of the Wolves
Xbox
- SNK vs Capcom: SVC Chaos
- The King of Fighters 02/03
- The King of Fighters 2002
- The King of Fighters 2003*
- Capcom Classic Collection
- Final Fight*
- Street Fighter II: The World Warriors
- Street Fighter II: Champion Edition
- Street Fighter II Turbo: Hyper Fighting
- Capcom Classic Collection Vol. II
- Street Fighter
- Super Street Fighter II Turbo*
Playstation 2
- The King of Fighters Collection: The Orochi Saga*
- The King of Fighters '94
- The King of Fighters '95
- The King of Fighters '96
- The King of Fighters '97
- The King of Fighters '98
- The King of Fighters '98: Ultimate Match
- The King of Fighters 00/01*
- The King of Fighters 2000
- The King of Fighters 2001
- The King of Fighters XI*
- Fatal Fury Battle Archives
- Fatal Fury
- Fatal Fury 2
- Fatal Fury Special
- Fatal Fury 3: Road to Final Victory
- Fatal Fury Battle Archives 2
- Real Bout Fatal Fury
- Real Bout Fatal Fury Special
- Real Bout Fatal Fury 2: The Newcomers
- Street Fighter Alpha Anthology
- Street Fighter Alpha
- Street Fighter Alpha 2
- Street Fighter Alpha 2 Gold
- Street Fighter Alpha 3
- Street Fighter Alpha 3 Upper*
- Hyper Street Fighter Alpha
- Super Gem Fighter Mini Mix
Steam
- The King of Fighters 2002: Unlimited Match
- The King of Fighters XIII*
- Ultimate Marvel vs Capcom 3 (notable in this case only for the inclusion of Mike Haggar, who I may wish to use. I really wish he'd been ported to the last update on Street Fighter IV... but he wasn't.)
- Ultra Street Fighter IV*
Playstation 4
- Street Fighter V
- Street Fighter V: Champion Edition* (I listed these separately, the CE overwrites the original version.)