Xerneas

Xerneas's extremely well-rounded stats and great Special Attack allow it to become a powerful attacker, and it is able to further boost its offensive prowess with Fairy Aura and Geomancy. These qualities let Xerneas serve numerous roles both offensively and defensively, making it difficult to switch into. It has many coverage options like Focus Blast and Psyshock to deal with some of its checks. Despite having more options for offensive sets, Xerneas can also utilize its high HP stat paired with its nice defensive typing for more defensive sets or act as a cleric with moves like Aromatherapy and Roar. However, Xerneas lacks reliable recovery and relies on Rest to regain health, which leaves it vulnerable. Xerneas also struggles against Steel- and Fire-types and has very few options to deal with them outside of Focus Blast. Multiple priority users can also overwhelm Xerneas and revenge kill it.