So crawdaunts at +2 atk (swords dance) it mhas splash plate (1.2x) STAB(1.5x) and it uses aqua jet (priority) so how much power will it have not how much damage it can do to a lvl 1 Pokemon!
The Aqua Jet will have a base 288 power. Calcs:
The damage this will do can't be calculated because it will do a different amount of damage to ever other Pokemon.