Synchronize
If another Pokemon burns/poisons/paralyzes this Pokemon, the status is copied to the attacker.
Out of battle effect:
If this Pokemon is alive and in the lead, there is an extra 26% chance for wild Pokemon to have the same nature. This chance increases with LLE. For shop rolled Pokemon, the chance is 63%.
A Synchronize Stone allows your Synchronize Pokemon to be placed anywhere in your party.