A giant mechanical tank, looking similar to a castle, with four cylinders that act as support structures. It dishes out Holy damage. In FF9, Alexander was the guardian eidolon for Alexandria Castle (it actually WAS part of the castle); however, it was not summonable in battle.
FF6 Advance (SUMMON)
ATK: Divine Judgement
ATK: Holy Judgement
|FF9 (NON-SUMMONABLE CHARACTER)|
The first picture is of the Al'Zadaal Undersea Ruins, which are actually the broken up pieces of the previous incarnation of Alexander, whereas Alexander itelf is a boss which appears towards the end of the mission related to the ruins.
CP: The Alexander: No. 1 Heavy Carrier Class Airship. Being the flagship of the 12th Fleet of the Archadian Imperial Army. The 12th Fleet, commanded by Judge Zargabath, operates under the Galtea Tactical Force of the Western Armada, led by Lord Vayne.