Twilight Trails: Mega Editions Arrive in GO Battle League with Weekly Cups and Rewards

GO Battle League's Twilight Trails runs Sept 8–Dec 1, 2026, introducing Mega Edition formats across Great/Ultra/Master Leagues and a slate of themed Cups. The season features CP reductions for Mega Pokémon, weekly schedule rotations, GO Battle Thursday bonuses (up to 4× Stardust and an increased battle cap), and a rewards system with Rank-based encounters, a seasonal reward pool, and a Timed Research pass awarding Stardust, Rare Candy XL, and Elite TMs. Avatar rewards themed to Ryme are unlocked at ranks 10, 15, and 20. This season centers Mega Evolution in PvP, with a comprehensive list of cups (Willpower, Retro, Mega Color, Little, Fantasy, Mega Halloween, 2026 LAIC, Mega Catch, etc.) and Mega Edition rules per league.