The saltwater causes metal to rust. Damages mechanical enemies.
| Price | |
| Buy | 400 DP |
| Sell | 200 DP |
| Target |
| Enemies |
| Chapter 1 | Chapter 2 | Chapter 3 | Chapter 4 | Chapter 5 | Chapter 7 | Chapter 8 |
| X | X | X | X |
Saltwater Gun is: dropped by enemies, available at shops, found in gift boxes.
| Enemy | Drop Chance |
| Mecha-Turtle | 3 % |
| Sky Titany | 5 % |
| Sticky Slug | 5 % |
| Boa Transistor | 10 % |
| Shop | Location |
| Dangerous Stuff | Highway |
| Bomb Salesman | New Pork City |