Learnt by Level Up

These Pokémon learn Water Gun at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Squirtle	15	water
Wartortle	15	water
Blastoise	1	water
Poliwag	19	water
Poliwhirl	1	water
Poliwrath	1	water fighting
Tentacool	22	water poison
Tentacruel	22	water poison
Slowpoke	33	water psychic
Slowbro	33	water psychic
Horsea	30	water
Seadra	30	water
Staryu	17	water
Starmie	1	water psychic
Lapras	1	water ice
Vaporeon	1	water
Omanyte	1	rock water
Omastar	1	rock water
Totodile	13	water
Croconaw	13	water
Feraligatr	1	water
Chinchou	17	water electric
Lanturn	17	water electric
Marill	10	water fairy
Azumarill	1	water fairy
Politoed	1	water
Wooper	1	water ground
Quagsire	1	water ground
Slowking	15	water psychic
Qwilfish	19	water poison
Corsola	5	water rock
Remoraid	1	water
Octillery	1	water
Mantine	1	water flying
Kingdra	1	water dragon
Suicune	11	water
Mudkip	10	water
Marshtomp	1	water ground
Swampert	1	water ground
Lombre	1	water grass
Ludicolo	1	water grass
Wingull	1	water flying
Pelipper	1	water flying
Surskit	1	bug water
Masquerain	1	bug flying
Azurill	21	normal fairy
Wailmer	10	water
Wailord	1	water
Barboach	11	water ground
Whiscash	11	water ground
Corphish	1	water
Crawdaunt	1	water dark
Anorith	19	rock bug
Armaldo	1	rock bug
Milotic	1	water
Castform	10	normal
Spheal	1	ice water
Sealeo	1	ice water
Walrein	1	ice water
Clamperl	1	water
Huntail	1	water
Gorebyss	1	water
Relicanth	8	water rock
Luvdisc	12	water
Piplup	6	water
Prinplup	8	water
Empoleon	8	water steel
Bibarel	15	normal water
Buizel	6	water
Floatzel	6	water
Shellos	1	water
Gastrodon	1	water ground
Finneon	6	water
Lumineon	1	water
Mantyke	1	water flying
Manaphy	1	water
Oshawott	7	water
Dewott	1	water
Samurott	1	water
Panpour	10	water
Basculin Red Striped	1	water
Tirtouga	1	water rock
Carracosta	1	water rock
Ducklett	1	water flying
Swanna	1	water flying
Frillish	1	water ghost
Jellicent	1	water ghost
Stunfisk	1	ground electric
Froakie	5	water
Frogadier	1	water
Greninja	1	water dark
Binacle	4	rock water
Barbaracle	4	rock water
Skrelp	1	poison water
Dragalge	1	poison dragon
Clauncher	1	water
Clawitzer	1	water
Goomy	5	dragon
Sliggoo	1	dragon
Goodra	1	dragon
Volcanion	1	fire water
Popplio	1	water
Brionne	1	water
Primarina	1	water fairy
Wishiwashi Solo	1	water
Dewpider	1	water bug
Araquanid	1	water bug
Bruxish	1	water psychic
Tapu Fini	1	water fairy
Sobble	6	water
Drizzile	1	water
Inteleon	1	water
Chewtle	1	water
Drednaw	1	water rock
Cramorant	7	flying water
Pincurchin	5	electric
Dracovish	1	water dragon
Arctovish	1	water ice
Basculegion Male	1	water ghost
Quaxly	1	water
Quaxwell	1	water
Quaquaval	1	water fighting
Tadbulb	11	electric
Bellibolt	11	electric
Wiglett	1	water
Wugtrio	1	water
Finizen	1	water
Palafin	1	water
Dondozo	1	water
Tatsugiri	1	dragon water
Castform Sunny	10	fire
Castform Rainy	10	water
Castform Snowy	10	ice
Basculin Blue Striped	1	water
Blastoise Mega	1	water
Swampert Mega	1	water ground
Slowbro Mega	9	water psychic
Greninja Ash	1	water dark
Wishiwashi School	1	water
Stunfisk Galar	1	ground steel
Cramorant Gulping	7	flying water
Cramorant Gorging	7	flying water
Samurott Hisui	1	water dark
Sliggoo Hisui	1	steel dragon
Goodra Hisui	1	steel dragon
Basculin White Striped	1	water
Basculegion Female	1	water ghost
Palafin Hero	1	water
Tatsugiri Droopy	1	dragon water
Tatsugiri Stretchy	1	dragon water

Learnt through Breeding (Egg Moves)

These Pokémon learn Water Gun through Breeding (Egg Moves) at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Phanpy	0	ground
Lotad	0	water grass

Learnt by Technical Machines (TMs)

These Pokémon learn Water Gun by Technical Machines the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Rattata	0	normal
Raticate	0	normal
Nidorina	0	poison
Nidoqueen	0	poison ground
Nidorino	0	poison
Nidoking	0	poison ground
Clefairy	0	fairy
Clefable	0	fairy
Jigglypuff	0	normal fairy
Wigglytuff	0	normal fairy
Meowth	0	normal
Persian	0	normal
Psyduck	0	water
Golduck	0	water
Seel	0	water
Dewgong	0	water ice
Shellder	0	water
Cloyster	0	water ice
Krabby	0	water
Kingler	0	water
Cubone	0	ground
Marowak	0	ground
Lickitung	0	normal
Rhydon	0	ground rock
Chansey	0	normal
Kangaskhan	0	normal
Goldeen	0	water
Seaking	0	water
Jynx	0	ice psychic
Gyarados	0	water flying
Kabuto	0	rock water
Kabutops	0	rock water
Snorlax	0	normal
Articuno	0	ice flying
Dratini	0	dragon
Dragonair	0	dragon
Dragonite	0	dragon flying
Mewtwo	0	psychic
Mew	0	psychic