Originally Posted by Fat Lady Gaga
4 pages and no-one seems to mention Ekans... but OK I'll go ahead and nominate Ekans for B rank. It can choose to go offensive with the Coil set, or go on the defensive with Glare + Switcheroo + Swagger. It even gets two great abilities to suit either set, and if it has Intimidate that makes it a check, if not an outright counter to one of the most popular Pokemon in LC, Mienfoo. Of course, rather underwhelming stats and a weakness to Ground attacks (Watch out for Drilbur unless you can hit with Glare on the switch-in) do limit its effectiveness quite a bit, but Ekans is nonetheless an underrated Pokemon whom I believe deserves more usage.
I'm agreeing with this except maybe it should be High C. Defensively, as a Poison-type, Koffing would do better thanks to Levitate and much higher defenses. However, as an offensive Pokemon, Ekans does well because it can use Intimidate to come in on many Physical-based attackers barring Drilbur and set up a Coil. Ex: Mienfoo. Send in Ekans, who resists both Drain Punch/HJK and U-turn and can weaken all of Mienfoo's attacks. Now Mienfoo has to switch out since it won't be able to do anything against Ekans, giving it a free turn to set up Coil. Plus, Eviolite buffs Ekans's defenses pretty good so it can set up easier. And you can use Shed Skin > Intimidate if Mienfoo isn't a problem, which helps you beat status spreaders easier.