The Unlucky Lot Key was an item available in Plants vs. Zombies Adventures that was originally going to be used to unlock The Unlucky Lot along with 200,000 coins. It was found in level 30 of Zombitorium Manor. At the time, however, it was unusable, since the Unlucky Lot was never released.
Since Plants vs. Zombies Adventures shut down before it could have been used, not much is really known about it.
- Its appearance resembled a blueprint.