In Pokemon Go, an Ultra Wormhole is a portal that appears above a gym just before an Ultra Beast appears in Raid Battles. Ultra Wormholes are unstable portals that bring through Ultra Beasts from Ultra Space in Pokemon Go. These creatures are incredibly powerful and arrive from a different dimension called Ultra Space. Ultra Wormholes are heavily associated with Cosmog, a legendary Pokemon that is able to open them along with its final evolutions Solgaleo and Lunala. In terms of the Pokemon game franchise, Ultra Wormholes were first introduced in the Sun and Moon titles.

Players can find Ultra Wormholes above gyms when theyre active during special events. Instead of eggs appearing, players will see a mysterious portal to Ultra Space. Once the countdown timer ends, a powerful Ultra Beast will emerge, and the Ultra Wormhole will disappear. The Ultra Beast you can expect to appear will depend on the current event. Ultra Beast Raids typically only occur during an event, so players should keep an eye on the Pokemon GO Blog for the latest event news.

In summary, an Ultra Wormhole in Pokemon Go is a portal that appears above a gym just before an Ultra Beast appears in Raid Battles. These portals are unstable and bring through Ultra Beasts from Ultra Space, which are incredibly powerful creatures that arrive from a different dimension. Players can find Ultra Wormholes above gyms when theyre active during special events, and the Ultra Beast that appears will depend on the current event.