Masterberries in Final Fantasy Tactics Advance are purple variations of Tonberries. They are even more vicious than their green cousins, mainly because of their high Speed and devastating Voodoo attack.
This mission takes place in Muscadet. The Masterberry here is wanted for the murder of a viera and is flanked by two Tonberries. While the Masterberry starts off further away from the party than its underlings, it will soon get close enough to the party to use its dangerous Malice skills.