Pinsir

Pinsir has one of the highest Attack stats of any Swords Dance user in GSC UU. Its STAB Hidden Power Bug threatens common Pokemon such as Bellossom, Slowbro, Slowking, Hypno, and Mr. Mime. It has relatively few weaknesses, notably lacking the problematic weakness to Electric that its biggest competition Scyther has, and its above average Speed also lets it outrun Pokemon such as Nidoqueen, Kabutops, Victreebel, and Politoed. However, Pinsir can be difficult to switch in because of its low HP and Special Defense in a metagame with numerous special threats. Moreover, Pinsir is absolutely stonewalled by Haunter unless it runs the rare Hidden Power Ground and struggles with other common Pokemon such as Fire Blast Nidoqueen, Qwilfish, and Scyther. Lastly, Pinsir faces huge competition from one of the best Pokemon in the tier in Scyther, which is faster, immune to Spikes, has better special bulk, and can do more for its team because of Baton Pass.