Mimic enemy line (Golden Sun)

In Golden Sun, there are several enemies named Mimic that are visually identical and individually battled at several different points. Unlike a typical enemy line where the monsters are randomly encountered and battled while exploring environments, every Mimic in the game can be seen in environments and may be optionally interacted with in order to start a battle with them. Mimics are seen as unopened treasure chests, and when one of these are attempted to be opened the chest will sprout legs and pincers and automatically engage the player in a battle.

Mimics are always fairly tough individual enemies compared to the enemies that are randomly encountered when exploring an area, but are never anywhere near as threatening or durable as a boss battle. The various differently-leveled versions of the Mimic have similar sets of commands and elemental resistances, and are always guaranteed to drop some sort of valuable consumable item.

Also see Mimic enemy line (The Lost Age) and Mimic enemy line (Dark Dawn).

In Golden Sun
Eight different levels of Mimic can be found in the game. They are ordered by when each one can be first battled, which appropriately orders them by level and overall battling statistics:

Mimic (Mercury Lighthouse)
The earliest Mimic, which is at level 13, can be fought in a room in southeast Mercury Lighthouse accessible after "activating" the Lighthouse with the Ply Psynergy, and is right next to a waterfall that can be walked through to get to a secret room with a chest containing the Psynergy Armor. Its Wind Slash Psynergy hits for moderate Jupiter damage to multiple Adepts, but its low PP rating means it will not be casting much of its Psynergy spells at all.

Its statistics are as follows:

It uses these battle commands:

Mimic (Fuchin Falls Cave)
This Mimic, which is level 14, can be fought in the first room one enters in Fuchin Falls Cave, to the upper right and accessible by a rolling log on water. Its Briar Psynergy hits for moderate Venus damage to multiple Adepts, but its low PP rating means not many of its Psynergy spells might actually be used.

Its statistics are as follows:

It uses these battle commands:

Mimic (Altin Peak)
This Mimic, which is level 16, can be fought not far from the beaten path in the middle layer of Altin Peak. Its Shine Plasma Psynergy hits for moderate Jupiter damage to multiple Adepts, and its PP rating starts getting higher.

Its statistics are as follows:

It uses these battle commands:

Mimic (Vault Cave)
This Mimic, which is level 19, can be fought in the first big room one enters in Vault Cave by ladder, to the lower right and not far from the beaten path. Its Sonic Slash Psynergy deals fairly strong Jupiter damage to multiple Adepts, and its PP rating allows it more usage of its Psynergy spells than previous Mimics.

Its statistics are as follows:

It uses these battle commands:

Mimic (Crossbone Isle (Golden Sun) #1)
This Mimic, which is level 20, can be fought right after the exit to the first dungeon level inside the optional Crossbone Isle. Like the first four sub-boss sets of enemies guarding the entrances to the first four dungeon levels, the Mimic can be battled earlier than might be expected if you reach the island through the secret Tolbi-bound Ship method. Its Sonic Slash Psynergy deals fairly strong Jupiter damage to multiple Adepts, and it is now capable of the Curse Psynergy.

Its statistics are as follows:

It uses these battle commands:

Mimic (Altmiller Cave)
This Mimic, which is level 21, can be fought in an earlier big dark room in Altmiller Cave, visibly nearby to the lower right of where you would emerge from upstairs. Its Nettle Psynergy hits for fairly hard Venus damage to multiple Adepts.

Its statistics are as follows:

It uses these battle commands:

Mimic (Suhalla Desert)
This Mimic, which is level 26, can be fought in the first big screen of Suhalla Desert, in an enclosed area with two linear entrances occupied by one Tornado Lizard each. Its Ice Missile Psynergy deals strong Mercury damage to multiple Adepts, and it is now capable of the Condemn Psynergy to possibly instantly down an Adept.

Its statistics are as follows:

It uses these battle commands:

Mimic (Crossbone Isle (Golden Sun) #2)
The last and most powerful Mimic in this game, which is level 30, can be fought on the Pirate Ship at the bottom of Crossbone Isle, on the lower portion of the ship a short distance away from where the battle with the powerful optional boss Deadbeard would ensue. Its Spark Plasma Psynergy hits for both strong and widespread Jupiter damage. While this Mimic is markedly stronger than all the others and has one of the highest agility ratings, compared to the larger enemy you are about to face (which uses Spark Plasma more frequently) this is no more than a warm-up battle.

Its statistics are as follows:

It uses these battle commands: