Expanding Force is a Psychic-type move with 80 power and 100% accuracy. When used in Psychic Terrain, its power increases by 50%, making it 120, and it targets all adjacent opponents in double battles. Additionally, its base power remains unchanged outside of Psychic Terrain. Expanding Force was introduced in Generation VIII and is favored for its dual utility in both single and double battles, as well as its synergy with terrain-based strategies. The move does not have any secondary effects such as inflicting status conditions.