How do I open chests locked by an ID scanner in the Grotto?
The title of this challenge might seem complicated, but rest assured, it's not! To complete this challenge you will have to go to the Caves, a locality located to the east of the island. Once there, you will have to disguise yourself as an acolyte, or put a KO and open chests secured by an ID scanner.It is imperative to perform one of these two steps to open these famous chests:
- Disguise yourself as a sidekick through the phone booths, then go to a chest and open it.
- Knock out a sidekick, carry him to the vault so the scanner scans him and not you.


As said above, the challenge consists of three stages. It will be necessary open 3, 5 and 10 chests to unlock the promised 55 XP.