Lunar Bahamut (Final Fantasy IV)

Lunar Bahamut is an optional boss in the GameBoy Advance port of Final Fantasy IV. It is fought during Kain's Lunar Trial at the Lunar Ruins. When beaten, the player obtains the Grimoire LB which if used as an item, summons Lunar Bahamut to deal 9999 damage to all enemies. Using up the Grimoire unlocks the trial door again.

Strategy
This is a hard battle as you will fight with Kain alone. Before you have entered the trial door you must have some Lunar or Light Curtains and some Hermes Shoes. When the battle starts you fight Dark Kain. A single jump causes him to counterattack and transform to Lunar Bahamut. Have Kain use a Lunar or Light Curtain to avert the Mega Flare attack with follows after a 5 second countdown. Using a Hermes Shoes can be an advantage to avoid the attack and be able to use Jump twice before getting damaged. Any damage should be healed with a Hi Potion or an Elixir. Finishing the battle gets you the Grimoire LB, the Dragoon Gloves, and Abel's Lance which is Kain's ultimate weapon in the game, this weapon also changes the Jump command to Dbl Jump.