Objectionable Lock is a puzzle in Professor Layton vs. Phoenix Wright: Ace Attorney. The puzzle must be solved in order to progress the story.


There appears to be an intricate keyhole in the middle of the massive door.

An inscription on the door reads:

"The 'key' to proceeding is in the key." If you recall, Maya tried unlocking the door with the key, but it would not turn.

Strange, indeed. Try using the key from different angles.


Click a Tab to reveal the Hint.

Think outside the box.

Start with inserting the key from both the left and right sides.

Remember to leave no stone unturned.

Hmm. There seems to be strange patterns etched on to the key itself.

Perhaps there is some connection to the inscription on the door?

Perhaps the key requires some sort of alteration to work?

Keep at it. The key's true form will soon be revealed and the solution will be well within your grasp!

First, try inserting the key using both sides.

Next, rotate the key and try unlocking the door with the top of the key.

Lastly, pay close attention to Phoenix when he points out something odd about the key.




The key fits perfectly into the hole, once it's broken into smaller pieces.

As the massive door opens, you can feel the presence of another puzzle...

  • Step 1: Test the key from this angle
  • Step 2: Test the key from this angle
  • Step 3: Test the key from this angle
  • Step 4: Press "Hold it!"
  • Step 5: Select "C" and press "Object"
  • Step 6: Put all the key pieces as shown
Community content is available under CC-BY-SA unless otherwise noted.