Gardevoir

Gardevoir has carved a solid niche in the metagame as a specially attacking Fairy-type due to the relative lack of ones that are legal. This makes it a great Dragon-type check, most notably being able to beat the common 'double dragon' core of Garchomp and Salamence. Add on to this its overdose of supportive options and access to two great abilities in Trace and Telepathy, along with just enough special bulk to switch into special hits once or twice, and you have a one of the best Pokemon in the format. However, its lackluster physical bulk means that it struggles to take moderately powerful physical hits while also being unable to handle any common priority move outside of Mach Punch, and it is weak to one of the more common of said moves in the format, Bullet Punch, meaning that it really struggles versus Scizor and Mega Lucario. In addition to its nonexistent physical bulk, Gardevoir's stats are overall middling, with a high Special Attack, moderately high Special Defense, and rather low numbers in the rest of its stats, most notably its underwhelming base 80 Speed for an offensive Pokemon.