Hydro Cannon
Effect
Fires a powerful water cannon. Has a 10% chance to lower the target’s Speed by one stage.
| Type | Category | Power | Accuracy | PP | Priority | Target |
|---|---|---|---|---|---|---|
| Water | Special | 100 | 100 | 10 | 0 | Selected target |
The in-game description is outdated.
Changes in Origin HeartGold
Compared with Pokémon HeartGold.
- Power: 150 → 100.
- Accuracy: 90% → 100%.
- PP: 5 → 10.
- Adds a 10% chance to lower the target’s Speed by one stage.
Ability interactions
- Mega Launcher — added in Origin HeartGold.
Pokémon that learn this move
Learn this move from the tutor below.
Move tutors
Two Island and Three Island, houses · Cost: Free
Requirements: Two Island: Granny Mae's ultimate-move trial
Only some Pokémon can learn this move. Follow the quest or location for requirements; the full compatible list is not known.
The official site of the Origin HeartGold English translation. Patches are published only on our GitHub releases.
A free, non-commercial fan project. Not affiliated with or endorsed by Nintendo, Creatures Inc., GAME FREAK inc. or The Pokémon Company.
© 2026 Origin HeartGold English translation team. Guide text: all rights reserved — see licence.