the attack power of the pokemon is doubled but if the ability is skill swapped the attack stat is halved instead
Azumarill learns aqua jet by an egg move.
to get it it has to breed with these pokemon that learn the move Golduck, Seel, Dewong, Kabuto,
Kabutops, Empoleon, Buizel, Floatzel, Tirtouga, Carracosta and Alomomola
and these pokemon that breed to get the move also Squirtle, Wartortle, Blastoise, Dratini, Dragonair, Dragonite, Totodile, Croconaw, Feraligatr, Marill, Azumarill, Surskit and Masquerain
Hope i helped!!!