Does Mobile Suit Gundam: Extreme Vs. Full Boost count as a fighting game? Because that one. Super easy to just pick up and play, tons of characters, and pretty deep gameplay once you get into it. It also had netcode good enough to play against Americans from Europe, which is extremely rare for a fighting game.
Sadly, while it's super popular in Japan (by far the most popular fighting game I've seen in their arcades), the franchise is basically completely dead in the west.
Full Boost was a Japanese exclusive so the only playerbase it had was from people that imported it. And instead of just bringing the game over Namco instead developed a crappy free-to-play PC "clone" called Rise of Incarnates that completely sucked, didn't even have the Gundam license, and died literally three months after the beta launched. Then they released Gundam Versus on current gen consoles with netcode so bad it was completely unplayable for me.
What's more, the PS4 Gundam Versus was apparently so unnoticed that it doesn't even have a wikipedia page. Even Rise of Incarnates has one, and again that's a game that literally shut down three months after launch.