Sega's Saturn is my go-to 2D fighter system. So much Capcom love there. Some of my faves:
Street Fighter Alpha 1 & 2
X-Men: Children of the Atom (published by Acclaim and hard as the dickens)
Marvel Super Heroes (LOVE this game)
X-Men Vs. Street Fighter
Pocket Fighter
Vampire Savior (aka Darkstalkers)
A few of those are imports but the Action Replay via cart slot makes the Saturn an extremely import-friendly machine. I still have a number of imports left on my wish list, actually. Marvel vs. Street Fighter and Cyberbots, namely.
Lots of other great games on Sat as well. Panzer Dragoon Zwei, Nights into Dreams, Burning Rangers (a little rough around the edges but I really liked the theme), Super Puzzle Fighter II Turbo, and the Virtua Cops. I hope to find Working Design's Sega Ages collection someday. And Sonic Jam. Oh, and import Night Strikers S! Really need to track that one down - loved playing the original arcade game in college. Think Space Harrier X Outrun and you'll have an idea.
I need to reacquire Magic Knight Rayearth and Guardian Heroes sometime. Sold those way back when. Sigh.
True story. Back in the day, I stopped by Toys R Us after work and was checking out their game clearance section. They had Street Fighter Alphas 1 & 2 for ten bucks each. They also had Panzer Dragoon Saga for twenty. I went with the Alphas.
Hashtag regrets.