'Pokémon Go' Heatran Raid: Counters and Everything You Need to Know On 1/12/21 at 1:12 PM EST Raids in Pokémon Gohave updated for the Sinnoh Celebration event and trainers will have more chances to catch Pokémon from Gen 4 than ever before. While trainers will be able to catch some of Sinnoh's most iconic Pokémon, like Buizel and the starters, the Legendary Pokémon Heatran will make its return to the mobile game. Starting Tuesday, January 12, and up until Sunday, January 17, at 8 p.m. local time, go out and explore the world of the Sinnoh region and battle Heatran and other Gen 4 Pokémon in the latest Raid update.