Lucario

Lucario makes its mark in UU as one of the best sweepers in the tier, which is shown through its great offensive movepool and access to both Swords Dance and Nasty Plot, making it a very potent sweeper, and its access to both physical and special priority, making it hard to revenge kill. It also has a great ability in Justified, which lets it take advantage of Dark-type moves, such as Mega Absol's Knock Off. However, Lucario has poor defenses, which make it hard for it to take nearly any hit; in some cases, it can even get 2HKOed by a resisted hit, despite its good set of resistances. Lucario has weaknesses to many common attacking types, particularly Fire, Fighting, and Ground, and its Speed stat, while by no means bad, is somewhat underwhelming, although this is slightly mitigated by Lucario's access to priority. Lucario also needs to set up in order to deal a lot of damage.