Mimic (Final Fantasy X)

Mimic is an enemy in Final Fantasy X, and is found in the Omega Ruins. It is named so for its behavior of mimicking Treasure Chests, and the shapes of fiends it takes on. There are four different shapes of the Mimic, each one having a different set of strengths and weaknesses. When encountering them in a battle (always with a Zaurus), they will show up in the form of a treasure chest. Steal from it (not Mug, as it'll destroy the chest), and if there's Nothing to steal... it'll 'change' into a fiendish look-alike from a pile of bones, rocks, and other debris.

While not one of the hardest enemies in the game, it is good to learn all of the weaknesses to take them down quickly and easily. Especially useful to know since they are one of the best sources of Gil in the game, with each one dropping 50,000 Gil, double that if a party member has the weapon ability Gillionaire. So, knowing what kills each shape quickly will guarantee survival along with quick Gil. Also one of the few enemies in the game that can not be 'captured' for the Monster Arena.

Shapes
Mimic (1): Takes on the shape of Dual Horn-like fiends. Has the highest strength and HP out of the four shapes. Both physical and magic attacks will work as both defensive stats are low.

Mimic (2): This one is in the shape of Mech Scouter-like machina. Has the lowest strength out of all the shapes, but good defense, magic defense and the highest speed.

Mimic (3): You guessed it, this is in the shape of the large Garuda/Zu fiends. Has the highest defense out of all the shapes but low magic defense, so magic is best used on it.

Mimic (4): In the shape of the Basilisk/Anacondaur fiends. Highest magic defense, but low defense, so beat it down with weapons.