Some new footage of Zygarde has emerged from the Taiwan Pokémon Championship. It shows Zygarde 10% Forme transforming into Zygarde Complete Forme when its HP is low, seemingly using the Cell/Core Zygardes. It then uses a new move that scorches a 'Z' on the ground.
Update: an official video has been released. It showcases the moves Thousand Arrows, Thousand Waves, and Core Enforcer.