Basement Key is a key item in the Pokémon series that holds a significant role in specific game events. The Basement Key is used to access certain locked locations, which generally house important plot points or critical items necessary for game progression.
Effect: Unlocks the door to the underground warehouse in Goldenrod City. This allows the player to battle Team Rocket members and proceed with the storyline.
Pokémon Ruby, Sapphire, and Emerald:
Used by trainer outside of battle : Opens the door to the basement tunnel under goldenrod city.
Short Effect: HS: Key to the tunnel under Goldenrod City. Gen III: Key to New Mauville.
Used by trainer outside of battle : Opens the door to the basement tunnel under goldenrod city.
| Generation | Game Index |
|---|---|
| Generation III | 271 |
| Generation IV | 476 |
| Generation V | 476 |
| Generation VI | 476 |
| Generation VIII | 476 |