Elixir

Elixir (エリクサー) is a rare healing item in the  series that fully heals one character's HP and MP. In Kingdom Hearts 358/2 Days, Elixir is in form of an item panel which restore all of your HP and Magic. In Kingdom Hearts Chain of Memories the Elixir card reloads all attack and magic cards. It can be used on the field, in battle and from the Main Menu. They can be synthesized, found in chests and Trinities and are occasionally awarded as prizes for completing certain tasks and quests. In Kingdom Hearts 3D: Dream Drop Distance, Elixir is also an evolved command in Flick Rush, restoring some of the party's HP and completely refilling their cards.

Kingdom Hearts

 * Elixir: Defender (1%), Wyvern (0.5%)

Kingdom Hearts II

 * Elixir: Devastator (5%), Living Bone (5%)

Kingdom Hearts Birth By Sleep

 * Elixir: Wild Bruiser (5%)

Kingdom Hearts

 * Elixir: Striking the cabinet in Pooh's Room.

Kingdom Hearts II

 * Elixir: Chest at the Mansion: Foyer; chest at the Crystal Fissure.

Kingdom Hearts Birth by Sleep

 * Elixir (Terra): Chest at the Mermaid Lagoon; chest at the Seat of War.
 * Elixir (Ventus): Chest at the Mermaid Lagoon; chest at the Seat of War; chest at the Twister Trench.
 * Elixir (Aqua): Chest at the Mermaid Lagoon; chest at Peter's Hideout; chest at the Seat of War.

Kingdom Hearts 358/2 Days

 * Elixir: Chest at the Cave/Entrance Hall during Mission 48; chest in the Undercroft, The East Wing, The West Wing, and the Entrance Hall Upper Level during Mission 83.

Kingdom Hearts 3D: Dream Drop Distance

 * Elixir (Sora): Chest at the Mysterious Tower; chest at the Cloudwalk; chest at the Avenue to Dreams; chest at the Contorted City.
 * Elixir (Riku): Chest at the Golden Wood; two chests at the Delusive Beginning; chest at the Fact within Fiction; two chests at the Verge of Chaos.

Kingdom Hearts III

 * Elixir: Chest at the Corridors, chest at Andy's House, chest at the Gorge, chest at the Seaport, chest at the North District.

Kingdom Hearts

 * Elixirs can occasionally be found by picking pumpkins and cabbage at Rabbit's House.

Kingdom Hearts Chain of Memories

 * Finding Roo in his hole causes him to give Sora an Elixir.

Kingdom Hearts 3D: Dream Drop Distance

 * Sora and Riku can purchase an Elixir from the Ducky Goose Ability Link for 50 Link Points.
 * Meow Wow can use Elixir as its evolved command.
 * Me Me Bunny can use Elixir as its evolved command.
 * Ducky Goose can use Elixir as its evolved command.
 * Frootz Cat can use Elixir as its evolved command.

Etymology
s are recurring items in the  series. In most of its appearances, the Elixir completely restores HP and MP for one character.