How do you get ancient Pokemon in Vortex?

To get Ancient Pokemon in Vortex, you must first acquire the Time Turner. It is an event-exclusive item; this means that you can only get that Pokemon during certain times. The Time Turner can be obtained from the Shop during these events.

Once you have acquired the Time Turner, you can enter ancient portals of the Vortex to find ancient Pokémon. These portals are scattered throughout the game world and will allow you to enter ancient dimensions where ancient Pokémon can be found.