Drapion has only OU counters and has been moved down to UU, so this is a UU counters section.
http://www.smogon.com/dp/pokemon/drapion
[Counters]
<p> Quagsire and Sandslash make excellent counters with their high defensive stats and STAB Earthquakes. Gastrodon works in a similar manner and also has an immunity to Knock Off. Steelix's high Defense allows it to survive through Drapion's Earthquakes and hit back with its own. </p>
<p> Drapion lacks resistances so its opportunities for switching in are limited. It often cannot handle strong STAB attacks, especially special ones.</p>
http://www.smogon.com/dp/pokemon/drapion
[Counters]
<p> Quagsire and Sandslash make excellent counters with their high defensive stats and STAB Earthquakes. Gastrodon works in a similar manner and also has an immunity to Knock Off. Steelix's high Defense allows it to survive through Drapion's Earthquakes and hit back with its own. </p>
<p> Drapion lacks resistances so its opportunities for switching in are limited. It often cannot handle strong STAB attacks, especially special ones.</p>