Demon Wall (Final Fantasy IV 2D)

The Demon Wall is a boss from Final Fantasy IV. It is the last wall of defense in the Sealed Cave after getting the last Dark Crystal.

Strategy
This battle needs to be fought quickly. Allow Rosa to cast Berserk on Cecil, Kain, and Edge. Rosa can then heal, or Raise them if the Demon Wall uses its 1-hit attack. Rydia should use Leviathan.

DS Version
Like all incarnations of the Demon Wall, this battle must be won quickly, as the Demon Wall will constantly close in on the party, and when it gets close enough, will start to use an Instant Death attack called Crush, just like all the versions of the game. This battle will be very difficult, as the wall has 99,999 HP (in all other versions, it only has 28,000 HP), and never seems to run out. Be very careful, and do not make any foolish mistakes. This battle is like all the versions of the game it is in, only far harder and longer.

Giving Rosa the "Dualcast" augment before the battle makes the battle slightly easier. Have Rydia always use her best summons, and Kain, Cecil, and Edge always attack on their turns. When it is Rosa's turn, Dualcast Slow on the Demon Wall and Haste on herself. Then cast Haste everyone else using Dualcast. Once you do this, have Rosa Dualcast Berserk on Cecil, Kain, Edge, and finally herself. Keep summoning with Rydia, and the Demon Wall should fall soon. Remember that this battle is easy if you follow the right steps.