I know it's stupid to ask these question, but I realize that Crawduant was pretty frail.
Bad Special defense, stat was given to SpA which was bad, Speed sucks, 85 Def was still not good, Dragon dance wont help a lot due to that Magnezone will outspeed it and OHKO it, Same as dragapult.
Smogon said it was a successful Wallbreaker, but to my sources, Magnezone, Alolan Marowak was a MUCH more better.
252+ Atk Thick Club Marowak-Alola Flare Blitz vs. 252 HP / 252+ Def Blissey: 562-663 (78.7 - 92.8%) -- guaranteed 2HKO
Possible damage amounts: (562, 570, 576, 582, 589, 595, 603, 609, 616, 622, 628, 636, 642, 649, 655, 663)
252+ Atk Life Orb Adaptability Crawdaunt Crabhammer vs. 252 HP / 252+ Def Blissey: 533-629 (74.6 - 88%) -- guaranteed 2HKO
Possible damage amounts: (533, 541, 546, 551, 559, 564, 572, 577, 585, 590, 595, 603, 608, 616, 621, 629)
So, as you see, Alolan Marowak could be a better and more successful Wall Breaker, and Crawdaunt also has a bad typing with 5 weakness and only 5 Resistence, which was bad.
252+ SpA Choice Specs Magnezone Thunderbolt vs. 0 HP / 0 SpD Crawdaunt: 782-924 (292.8 - 346%) -- guaranteed OHKO
Possible damage amounts: (782, 792, 800, 812, 822, 830, 840, 848, 858, 866, 876, 884, 894, 902, 912, 924)
So see how bad was it? I couldnt beleive that it was in OU tier