(Pokémon Red, Blue, Yellow, Gold, Silver and Crystal Versions)
Hydro Pump is a Water-type move.
Learnset
The following Pokémon can use Hydro Pump:
| Pokémon | Learnt |
|---|---|
| Goldeen | by breedingGSC |
| Totodile | by breedingGSC |
| Mantine | by breedingGSC |
| Squirtle | at level 42RBY |
| Squirtle | at level 47GSC |
| Wartortle | at level 47RBY |
| Wartortle | at level 53GSC |
| Blastoise | at level 52RBY |
| Blastoise | at level 68GSC |
| Psyduck | at level 50GSC |
| Psyduck | at level 52RBY |
| Golduck | at level 58GSC |
| Golduck | at level 59RBY |
| Poliwag | at level 43GSC |
| Poliwag | at level 45RBY |
| Poliwhirl | at level 49RBY |
| Poliwhirl | at level 51GSC |
| Tentacool | at level 48RBY |
| Tentacool | at level 49GSC |
| Tentacruel | at level 50RBY |
| Tentacruel | at level 55GSC |
| Horsea | at level 43GSC |
| Horsea | at level 45RBY |
| Seadra | at level 51GSC |
| Seadra | at level 52RBY |
| Staryu | at level 47RBY |
| Staryu | at level 50GSC |
| Gyarados | at level 1RB |
| Gyarados | at level 40GSC |
| Gyarados | at level 41RBY |
| Lapras | at level 46RBY |
| Lapras | at level 57GSC |
| Vaporeon | at level 52YGSC |
| Vaporeon | at level 54RB |
| Omanyte | at level 53RBY |
| Omanyte | at level 55GSC |
| Omastar | at level 49RBY |
| Omastar | at level 65GSC |
| Kabuto | at level 49RBY |
| Kabutops | at level 53RBY |
| Totodile | at level 52GSC |
| Croconaw | at level 55GSC |
| Feraligatr | at level 58GSC |
| Chinchou | at level 41GSC |
| Lanturn | at level 53GSC |
| Qwilfish | at level 46GSC |
| Kingdra | at level 51GSC |
| Suicune | at level 71GSC |
| Lugia | at level 44GSC |