Capcom and SNK are apparently in a race to see who can first release all of their classic games on modern platforms. Which has led to some great stuff, even if it occasionally gets a bit silly.
Rockman Battle & Fighters, a 2000 Neo-Geo Pocket Color game from Capcom that was originally licensed in 1990, was later scaled down to fit on portable hardware. The game is based on two mid-90s Capcom arcade games (Mega Man: The Power Battle and Mega Man 2: The Power Fighters, both of which included versus fighting elements to the Mega Man formula), but it was too late to make an impact on Segway's game.
Capcom Arcade 2nd Stadium has just released the arcade versions of Mega Man: The Power Battle and Mega Man 2: The Power Fighters for Switch a couple weeks ago. Each of those costs around $4, while the SNKs duo costs around $8.
Regardless of whether you want to play two obscure Mega Man arcade games, or the portable versions of those two in Japanese that are scaled down to the Neo Geo Pocket Color screen (and then back up to the Switch screen) all of which are great, as long as you can keep track of them.