Jirachi

Jirachi's above average bulk and great defensive typing give it a place in OU as one of the metagame's most consistent and reliable checks to Magearna, Tapu Lele, and Mega Alakazam while still packing plenty of Speed with Choice Scarf sets. Healing Wish is also an extremely valuable tool for bulky offense archetypes, giving the likes of Mega Charizard X and Volcarona a second shot a sweeping. Jirachi is no slouch offensively either, as courtesy of Serene Grace and Choice Scarf, Iron Head can pose a threat to several weakened or unprepared teams. Defensive sets can also be good picks on a handful of teams, notably providing Wish support and a near impenetrable counter to Tapu Lele, Mega Alakazam, and Magearna. Unfortunately, despite Jirachi's good typing, it is vulnerable to the tier's ever-present Ground-types in Landorus-T, Garchomp, and Gliscor and Fire-types like Heatran and Volcarona, as well as having a fearful weakness to Knock Off. Choice Scarf Jirachi can also struggle at times due to its rather average Speed and power and being pressured to U-turn not to lose momentum, which the opponent can and will take advantage of, whereas defensive sets also lose plenty of momentum naturally.