No, Palkia dos'nt learn Hydropump.
He cant learn that attack.
No, Palkia is not capable of learning Hydro Cannon.
Floatzel cannot learn Hydro Pump.
Quagsire cannot learn Hydro Pump.
Azumarill learn Hydro Pump at level 57.
Swampert does not learn Hydro Pump.