Alakazam

If not the best in class, Alakazam is at least one of the most powerful special sweepers in the UU tier. With excellent Speed and Special Attack stats, Alakazam goes through teams that lack priority moves or a Choice Scarf Pokemon with relative ease. While offense is Alakazam's natural role, it can also run a few useful supporting roles, such as dual screening and Encore support. Alakazam's main drawbacks are its paper-thin defenses and lack of resistances. Most priority attackers will take a huge chunk out of Alakazam's HP, threatening to cripple or OHKO it. While STAB Psychic is a great attacking type in UU, it also allows Dark-types to switch in without taking a scratch. Houndoom, for example, can come in on a Psychic-type attack and then OHKO Alakazam with STAB Sucker Punch or Dark Pulse.