Megalixir

Megalixir (ラストエリクサー) is a rare healing item in the Kingdom Hearts series that completely fills the entire party's HP and MP. It can be used on the field, in battle, and from the Main Menu. They can be found in chests in Worlds throughout both games, as well as in Trinities in Kingdom Hearts, and are occasionally awarded as prizes for completing certain tasks and quests, especially late in the games. They can also be synthesized in both games.

In Kingdom Hearts Chain of Memories, the Megalixir is the ultimate item card, obtained by opening the Room of Rewards on the 12th floor, Destiny Islands. It restores all attack cards and magic cards, and even resets the reload counter. It also is the most crucial piece of the powerful Sleight, Holy.

In Kingdom Hearts 358/2 Days, Megalixir is an Item Panel which fully restores all of HP and Magic to you and your comrades in the same map.

Kingdom Hearts
Megalixir can be synthesized once the fourth set is unlocked.
 * 5 Bright Shard
 * 3 Bright Gem
 * 1 Bright Crystal
 * 1 Shiny Crystal
 * 2 Gale

Kingdom Hearts Final Mix
Megalixir can be synthesized once the fifth set is unlocked.
 * 5 Lucid Gem
 * 3 Lucid Crystal
 * 2 Gale
 * 1 Dark Matter

Kingdom Hearts II

 * 2 Mythril Stone
 * 1 Power Stone
 * 1 Dark Stone
 * 1 Serenity Gem

Kingdom Hearts 358/2 Days
The Megalixir can be synthesized for 2500 munny once Roxas is promoted to Novice rank.
 * 1 Megalixir Recipe
 * 1 Mega-Potion
 * 1 Mega-Ether
 * 1 Shining Crystal

Kingdom Hearts

 * Megalixir: Rare Truffle (100 Hits)

Kingdom Hearts Birth by Sleep

 * Megalixir: Hareraiser (1%)

Kingdom Hearts Birth by Sleep

 * Megalixir (Terra): a chest at the Rainbow Falls: Base area, and in the Skull Rock: Cavern in Neverland; and a chest in the Twister Trench at the Keyblade Graveyard.
 * Megalixir (Ventus): a chest at the Rainbow Falls: Base area, and at the Cove in Neverland; and a chest in the Twister Trench at the Keyblade Graveyard.
 * Megalixir (Aqua): a chest at the Mysterious Tower; and a chest in the Twister Trench at the Keyblade Graveyard.

Kingdom Hearts 3D: Dream Drop Distance

 * Sora and Riku can purchase a Megalixir from the Drak Quack Ability Link for 50 Link Points.
 * Sora and Riku can purchase a Megalixir from the R & R Seal Ability Link for 100 Link Points.

Mégalixir Final-Elixier