As part of Pokemon Go's Luminous Legends Y event (which begins tomorrow, May 18), developer Niantic has kicked off a Team Go Rocket challenge in the game. If players around the world can collectively defeat 25 million Team Go Rocket grunts by May 23, Niantic will unlock a handful of bonuses for the second part of the event, including a new Shiny Pokemon.

The bonuses will go live beginning May 25. First, all players will receive triple the normal amount of XP for catching Pokemon for the remainder of the event. On top of that, Galarian Zigzagoon will begin appearing in one-star Raid Battles. This opens up more opportunities to catch the regional variant in Pokemon Go.

Perhaps most enticing of all, Niantic will also introduce Shiny Galarian Zigzagoon to the game if players can complete the challenge. This Shiny variant will be available even after the Luminous Legends Y event ends.