Catch Lunatone and Solrock with boosted Shiny odds and exclusive Research tasks during Celestial Research Day 2025. Pokémon GO Celestial Research Day 2025 takes place on Saturday, December 20, 2025, from 2:00 p.m. to 5:00 p.m. local time. This limited-time event features Lunatone and Solrock, two cosmic Pokémon with boosted shiny odds, special Field Research tasks, and a Paid Timed Research for even more encounters.