https://www.polygon.com/videos/2018/11/19/18102137/super-smash-bros-ultimate-what-are-spirits-spirits-mode

Super Smash Bros. Ultimate is introducing a new collectible called “Spirits.” They’re replacing trophies as the main collectible in Smash, and they’re pretty much Pogs. Rather than 3D models, they’re cutout images of characters from deep video game lore — and not just Nintendo’s. We’ve got Goku (not that Goku), multiple versions of Revolver Ocelot, and some guy from Disaster: Day of Crisis.

These little dudes aren’t just for looking at! They factor into the gameplay of a few modes: World of Light, and Spirit Board.