i'm in your conscience
I'd go for a mixed set. Try Surf, Ice Beam, Brick Break, Facade/Swords Dance. Surf is obviously great STAB. Ice Beam to expel pesky Grass types and Dragons. Brick Break for opposing Dark types. Facade is more filler, so you could just go with Swords Dance instead, but seeing that this is a solo, you might want more fire power than set up power. It sucks that Crawdaunt basically has no good Dark STAB moves this game (if you change this to Emerald, you get Crunch at 51), but eh, gotta just go with it. No Earthquake either, which sucks.