When I use TR + NP Cofagrigus I usually get at least one KO per game, but that's it. I find that I have trouble bringing it in on non-resistant moves because of the lack of bulk. Like Heysup mentioned, it's pretty hard to set up both TR and NP. I usually find myself picking just one of those moves. If I can't set up both then Cofagrigus doesn't live for long, as I will explain below. This strategy works best against slower teams, so just make sure you pack a fast Pokemon like Entei that can take a +0 Shadow Ball. It is an extremely good Pokemon, but not unbeatable.
Beating TR + NP Cofagrigus is relatively easy. You just need to keep putting pressure on it. Because this is a more offensive set, it is much less bulky and thus easier to wear down. It doesn't have Rest either, making it even easier to beat. That's why it functions best as a late game sweeper, KOing weakened Pokemon under Trick Room.
The best counters that I can think of are SpDef Mandibuzz, Spiritomb, Drapion, and Roselia (with Sleep Powder). I didn't mention Munchlax because it loses 1 on 1, and a +4 HP Fighting does 48.53 - 57.52% :D (I just beat a Munchlax with Cofag last night).
Other stuff that can do huge damage like Honchkrow and Entei are also decent checks to Cofagrigus, putting it into KO range.
Beating TR + NP Cofagrigus is relatively easy. You just need to keep putting pressure on it. Because this is a more offensive set, it is much less bulky and thus easier to wear down. It doesn't have Rest either, making it even easier to beat. That's why it functions best as a late game sweeper, KOing weakened Pokemon under Trick Room.
The best counters that I can think of are SpDef Mandibuzz, Spiritomb, Drapion, and Roselia (with Sleep Powder). I didn't mention Munchlax because it loses 1 on 1, and a +4 HP Fighting does 48.53 - 57.52% :D (I just beat a Munchlax with Cofag last night).
Other stuff that can do huge damage like Honchkrow and Entei are also decent checks to Cofagrigus, putting it into KO range.