The term “Battle Styles” refers to the two fighting styles of the legendary Pokémon Urshifu, found in Pokémon Sword & Shield’s The Isle of Armor expansion. When it evolves from Kubfu at the Tower of Darkness (Single Strike), it becomes a fighting/dark type. When it evolves at the Tower of Waters (Rapid Strike), it becomes a fighting/water type. The Single Strike and Rapid Strike concept was developed further in the Pokémon TCG in the set Battle Styles and several later sets.