| Type | water | 
| Category | Special | 
| Power | 150 | 
| Accuracy | 90 | 
| PP | 5 | 
| Introduced | Generation 3 | 
User must recharge next turn.
When a Pokémon is holding Waterium Z and uses its Z-Power, Hydro Cannon turns into Hydro Vortex and has base power 200.
| Ruby Sapphire Emerald | Powerful, but leaves the user immobile the next turn. | 
| FireRed LeafGreen | The foe is hit with a watery cannon. The user can’t move on the next turn. | 
| Diamond Pearl Platinum HeartGold SoulSilver | The foe is hit with a watery blast. The user must rest on the next turn, however. | 
| Black White Black 2 White 2 | The target is hit with a watery blast. The user must rest on the next turn, however. | 
| X Y O.Ruby A.Sapphire | The target is hit with a watery blast. The user can’t move on the next turn. | 
| Sun Moon Ultra Sun Ultra Moon | The target is hit with a watery blast. The user can’t move on the next turn. | 
| Sword Shield B.Diamond S.Pearl | The target is hit with a watery blast. The user can’t move on the next turn. | 
| English | Hydro Cannon | 
|---|---|
| Spanish | Hidrocañón | 
| Italian | Idrocannone | 
| Japanese | ハイドロカノン (Hydro Cannon) | 
| German | Aquahaubitze | 
| French | Hydroblast |