Read on below to learn more about Pokémon Sleep: Event: Raikou Research The Legendary Pokémon Raikou appears! Repeated peals of thunder have been heard over a certain area of Greengrass Isle! Follow-up research in the area revealed bits of Raikou Mane that Raikou left behind. According to Professor Neroli, he’ll be able to conduct research … Continue reading Pokémon Sleep Raikou Research event featuring Raikou’s in-game debut now underway until April 8 at 3:59 a.m. local time, full event details revealed