Pokémon GO players worldwide will be able to step into the Unova region starting in March.

The free event, which takes place on March 1 and March 2, will feature the Unova region from the Pokémon Black and Pokémon White video games. Players will be able to grab Black Kyurem and White Kyurem through Pokémon fusion, and they’ll also have a chance to obtain Shiny Meloetta, Shiny Maractus, Shiny Sigilyph, Shiny Bouffalant, and Shiny Deerling through various methods.

During the two-day event, players will keep track of their progression with the free Tour Pass. This special tour pass will arrive next Monday (February 24) at 10:00 a.m. local time. More rewards can be unlocked by purchasing the Tour Pass Deluxe, which automatically grants players an encounter with Mythical Pokémon Victini. More information about the event can be found here.

Pokémon GO is available on mobile phones right now. Since its launch back in 2016, the AR game has been downloaded by one billion people worldwide and has earned over $6 billion in revenue.