Crobat

Crobat is a lesser-seen Pokemon in GSC UU, suffering from its lack of a strong STAB attack, shallow movepool, and poor typing that leaves it weak to common attacking types such as Electric and Psychic. However, it possesses a few defensive quirks that can't be replicated by any other Pokemon in the tier. Most notably, Crobat is the absolute best counter to GSC UU's most threatening sweeper in Scyther thanks to its base 130 Speed, access to Haze, and lack of a weakness to any of its attacks. It can also check other dangerous Pokemon in the tier such as Victreebel and Swords Dance Bellossom, and it notably is able to outspeed Quagsire that had an Agility boost passed to it, preventing a Belly Drum sweep. These niches give it a role on defensive teams. However, some of the most prominent Pokemon in GSC UU can switch into Crobat and threaten it easily, such as Nidoqueen, Slowbro, and Granbull.