Goldoba passcodes
These are the 4-digit numbers that you normally acquire by defeating Imperial Walkers (gold floating robots) on the Goldoba.
Password - Effect
4649 - Fires cannon (no effect)
1342 - Fires cannon (no effect)
1004 - Forced to fight Imperial Walkers
0429 - Forced to fight Imperial Walkers
0819 - Gain a Magnus
3291 - Gain a Magnus
4653 - Unlocks the bridge so you can progress to the boss fight