Jirachi

Jirachi's typing allows it to competently check Fairy-types, as well as deal with Latias and Latios, thanks to Jirachi's secondary Psychic typing also giving it a quadruple resistance to Psyshock. Serene Grace alongside Iron Head only helps Jirachi to check various Pokemon, and rare support moves such as Healing Wish and Wish are fantastic, with U-turn, Ice Punch, and Fire Punch all useful as well. Solid 100 base stats across the board bolster Jirachi's durability, with base 100 Speed also being above-average in Ubers.

However, weaknesses to Ground, Ghost, Dark, and Fire are very exploitable in a metagame where Primal Groudon, Arceus-Ghost, Ho-Oh, and several Dark-types appear on the majority of teams, and being bait for Primal Groudon in particular can cause Jirachi several problems. Its middling base 100 Attack and low Base Power moves mean that Jirachi can struggle to deal heavy damage to opposing Pokemon, even with super effective attacks.