Learnt by Level Up

These Pokémon learn Hydro Pump at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Squirtle	42	water
Wartortle	47	water
Blastoise	52	water
Psyduck	52	water
Golduck	59	water
Poliwag	45	water
Poliwhirl	49	water
Poliwrath	1	water fighting
Tentacool	48	water poison
Tentacruel	50	water poison
Shellder	61	water
Cloyster	1	water ice
Horsea	45	water
Seadra	52	water
Staryu	47	water
Starmie	1	water psychic
Gyarados	1	water flying
Lapras	46	water ice
Vaporeon	54	water
Omanyte	53	rock water
Omastar	49	rock water
Kabuto	49	rock water
Kabutops	53	rock water
Totodile	52	water
Croconaw	55	water
Feraligatr	58	water
Chinchou	41	water electric
Lanturn	53	water electric
Marill	45	water fairy
Azumarill	57	water fairy
Politoed	1	water
Qwilfish	46	water poison
Remoraid	42	water
Octillery	52	water
Kingdra	51	water dragon
Suicune	71	water
Lugia	44	psychic flying
Mudkip	42	water
Marshtomp	55	water ground
Swampert	63	water ground
Lombre	49	water grass
Ludicolo	1	water grass
Pelipper	61	water flying
Wailmer	50	water
Wailord	59	water
Milotic	40	water
Castform	50	normal
Huntail	50	water
Gorebyss	50	water
Relicanth	64	water rock
Luvdisc	40	water
Kyogre	45	water
Piplup	43	water
Prinplup	51	water
Empoleon	59	water steel
Buizel	45	water
Floatzel	57	water
Mantyke	49	water flying
Palkia	42	water dragon
Oshawott	43	water
Dewott	52	water
Samurott	62	water
Tympole	42	water
Palpitoad	47	water ground
Seismitoad	53	water ground
Tirtouga	51	water rock
Carracosta	61	water rock
Frillish	49	water ghost
Jellicent	53	water ghost
Alomomola	61	water
Keldeo Ordinary	67	water fighting
Froakie	48	water
Frogadier	55	water
Greninja	60	water dark
Skrelp	42	poison water
Dragalge	42	poison dragon
Volcanion	50	fire water
Popplio	43	water
Brionne	51	water
Primarina	55	water fairy
Wishiwashi Solo	54	water
Tapu Fini	58	water fairy
Inteleon	62	water
Cramorant	56	flying water
Finizen	50	water
Palafin	50	water
Iron Bundle	77	ice water
Walking Wake	84	water dragon
Castform Sunny	50	fire
Castform Rainy	50	water
Castform Snowy	50	ice
Keldeo Resolute	67	water fighting
Blastoise Mega	60	water
Gyarados Mega	41	water dark
Kyogre Primal	75	water
Greninja Battle Bond	68	water dark
Greninja Ash	68	water dark
Wishiwashi School	54	water
Cramorant Gulping	56	flying water
Cramorant Gorging	56	flying water
Samurott Hisui	63	water dark
Palkia Origin	88	water dragon
Palafin Hero	50	water

Learnt through Breeding (Egg Moves)

These Pokémon learn Hydro Pump through Breeding (Egg Moves) at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Goldeen	0	water
Mantine	0	water flying
Surskit	0	bug water
Carvanha	0	water dark
Barboach	0	water ground
Bagon	0	dragon
Panpour	0	water

Learnt by Technical Machines (TMs)

These Pokémon learn Hydro Pump by Technical Machines the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Slowpoke	0	water psychic
Slowbro	0	water psychic
Kingler	0	water
Lickitung	0	normal
Rhydon	0	ground rock
Kangaskhan	0	normal
Seaking	0	water
Magikarp	0	water
Snorlax	0	normal
Dratini	0	dragon
Dragonair	0	dragon
Dragonite	0	dragon flying
Mew	0	psychic
Wooper	0	water ground
Quagsire	0	water ground
Slowking	0	water psychic
Corsola	0	water rock
Tyranitar	0	rock dark
Wingull	0	water flying
Masquerain	0	bug flying
Exploud	0	normal
Aggron	0	steel rock
Sharpedo	0	water dark
Whiscash	0	water ground
Corphish	0	water
Crawdaunt	0	water dark
Walrein	0	ice water
Shelgon	0	dragon
Salamence	0	dragon flying
Rayquaza	0	dragon flying
Shellos	0	water
Gastrodon	0	water ground
Munchlax	0	normal
Finneon	0	water
Lumineon	0	water
Lickilicky	0	normal
Rhyperior	0	ground rock
Arceus	0	normal
Basculin Red Striped	0	water
Hydreigon	0	dark dragon
Clauncher	0	water
Clawitzer	0	water
Goodra	0	dragon
Avalugg	0	ice
Mareanie	0	poison water
Toxapex	0	poison water
Araquanid	0	water bug
Bruxish	0	water psychic
Drampa	0	normal dragon
Dhelmise	0	ghost grass
Sobble	0	water
Drizzile	0	water
Chewtle	0	water
Drednaw	0	water rock
Arrokuda	0	water
Barraskewda	0	water
Grapploct	0	fighting
Cursola	0	ghost
Pincurchin	0	electric
Eiscue Ice	0	ice
Arctozolt	0	electric ice
Dracovish	0	water dragon
Arctovish	0	water ice
Drakloak	0	dragon ghost
Dragapult	0	dragon ghost
Basculegion Male	0	water ghost
Overqwil	0	dark poison
Quaxly	0	water
Quaxwell	0	water
Quaquaval	0	water fighting
Wiglett	0	water
Wugtrio	0	water
Veluza	0	water psychic
Dondozo	0	water
Tatsugiri	0	dragon water
Clodsire	0	poison ground
Iron Jugulis	0	dark flying
Roaring Moon	0	dragon dark
Basculin Blue Striped	0	water
Slowpoke Galar	0	psychic
Slowbro Galar	0	poison psychic
Slowking Galar	0	poison psychic
Corsola Galar	0	ghost
Eiscue Noice	0	ice
Qwilfish Hisui	0	dark poison
Goodra Hisui	0	steel dragon
Basculin White Striped	0	water
Basculegion Female	0	water ghost
Tauros Paldea Aqua Breed	0	fighting water
Wooper Paldea	0	poison ground
Tatsugiri Droopy	0	dragon water
Tatsugiri Stretchy	0	dragon water