Crawdaunt Knock Off vs Walls and resist.
252+ Atk Life Orb Adaptability Crawdaunt Knock Off (97.5 BP) vs. 252 HP / 232+ Def Skarmory: 164-195 (49.1 - 58.3%) -- 64.8% chance to 2HKO after Leftovers recovery
252+ Atk Life Orb Adaptability Crawdaunt Knock Off (97.5 BP) vs. 252 HP / 0 Def Heatran: 273-322 (70.7 - 83.4%) -- guaranteed 2HKO after Leftovers recovery
252+ Atk Life Orb Adaptability Crawdaunt Knock Off (97.5 BP) vs. 0 HP / 0 Def Hydreigon: 156-185 (48 - 56.9%) -- 89.1% chance to 2HKO
Crawdaunt with Status.
252+ Atk Life Orb Adaptability burned Crawdaunt Knock Off (97.5 BP) vs. 252 HP / 0 Def Jellicent: 382-452 (94.5 - 111.8%) -- 68.8% chance to OHKO
252+ Atk Life Orb Adaptability burned Crawdaunt Knock Off vs. 0 HP / 0 Def Mega Medicham: 110-130 (42.1 - 49.8%) -- guaranteed 3HKO
Summary.
Knock Off is a very popular move this metagame due to its buff. Crawdaunt receives both STAB and Adaptability boost on Knock Off bringing it to a base 195 Attack. This paired with Crawdaunt's already scary attack stat can deal some pretty incredible damage. Not to mention most people will run Swords Dance allowing them to get a +2 Adamant Stab Adaptability Knock Off. Things that can hit Crawdaunt hard are Scarfers who resist his STAB priority Aqua Jet, such as Latios, Hydreigon, Salamence. Or Bulky attackers like Azumarill.