It seems like Kirby Fighters 2 has been leaked for Nintendo Switch.
The original Kirby Fighters was a mini-game within the Nintendo 3DS game Kirby: Triple Deluxe, after which it was ported as a standalone version dubbed Kirby Fighters Deluxe (pictured above).
The leaked listing reveals the following blurb, alongside a $19.99 price point:
Choose from a cast of Kirby’s most iconic copy abilities—including the brand-new Wrestler ability—and duke it out to be the last Kirby standing. Familiar friends and foes like Bandana Waddle Dee and King Dedede also make an appearance as playable characters in the Kirby Fighters 2 game, available exclusively for the Nintendo Switch system.