Here are some possibilities for what you might be thinking of:
* Friend Codes: Pokemon Rumble might have used Friend Codes in earlier iterations, allowing players to connect and trade with friends online. This is a common feature in Pokemon games.
* Online Codes: There might have been specific online codes or passwords released by Nintendo for events or promotions related to the game, but these would be time-limited and are unlikely to be active anymore.
* Specific Game Modes: Some Pokemon Rumble games might have had password-protected features for specific game modes like a "Challenge Mode" or "Online Battle."
To get a definitive answer, please tell me:
* Which Pokemon Rumble game are you referring to? (e.g., Pokemon Rumble Blast, Pokemon Rumble World)
* What are you hoping to achieve with the password? (e.g., connect with friends, unlock content, etc.)
With this information, I can help you find the right solution.