Haunter

Haunter is one of the stronger offensive threats in GSC UU, with very good Special Attack, great coverage options in Psychic and Thunder, and access to rare moves like Thief and Explosion that let it circumvent some of its checks. It has enough Speed to outpace all of the bulkier Pokemon commonly seen, as well as being able to use its Ghost typing to check the threatening Granbull. However, there are a number of shortcomings that stop it from being a more consistent wallbreaker. Its pitiful bulk leaves it either 2HKOed or 3HKOed by most neutral hits, and common Ground- and Psychic-types like Nidoqueen, Piloswine, and Slowbro threaten to OHKO it with their super effective STAB moves. It also often needs to use Explosion in order to break other teams and give partners opportunities to make progress, leading to Haunter being somewhat difficult to use to its full potential. Lastly, while its Speed tier of 95 is solid, it is outsped by numerous other offensive Pokemon including Scyther, Dodrio, Electabuzz, and Kadabra, the last of which can OHKO it.