True,so a physical Crawdaunt,and I keep forgetting that Type isnt attached Atk or SpAtk,Im just in my litlte RSE world.But Crawdaunt is primarily physical (not that the Special Attack is TERRIBLE but) so that would be a weird way to go with it.
Also Perish Song is one of those moves that effects EVERYONE, regardless of type, iirc.
So in the real world,yes,he would be a attack tank.