Check out the Raikou, Entei, and Suicune Reveal Trailer for Pokemon Sleep, the hit Pokemon-themed sleep tracking mobile app developed by Select Button Inc. Players can soon research three iconic Pokemon with Raikou, Entei, and Suicune and explore a new area with Amber Canyon. The Raikou, Entei, and Suicune Research Event kicks off in September 2025 with Amber Canyon being added to the game in November 2025 for Pokemon Sleep, available now for iOS and Android.