what are wormholes in pokemon go

In Pokemon Go, wormholes are portals that appear above gyms just before an Ultra Beast raid battle starts. Ultra Wormholes are unstable portals that bring through Ultra Beasts from Ultra Space in Pokemon GO. They are pretty much the same as Raid Eggs but will always lead to an Ultra Beast encounter. Ultra Beasts are incredibly powerful creatures that arrive from a different dimension called Ultra Space. Ultra Wormholes are important as theyre a way that Ultra Beasts can enter into the world. Ultra Beasts are just as powerful as Legendaries and could really shake up the Go Battle League meta. Currently, there are seven Ultra Beasts available in Pokemon Go through Wormholes. Players can find Ultra Wormholes above gyms when theyre active during special events.