Panacea

The Panacea (オールキュア) is an item introduced in Kingdom Hearts 358/2 Days. It cures the user of any negative status ailments that they are inflicted with. Panacea are also known to be incredibly valuable; each one sells for 1400 munny. Although they are incredibly valuable, they are also incredibly common; appearing in multiple chests, multiple completion, random rewards, and freebies. They can also be purchased from the Moogle shop for 140 Heart Points.

Panaceas are also used in Kingdom Hearts Birth by Sleep and remove all negative status effects such as poisoning. They are each worth 50 Munny.

Panaceas are again used in Kingdom Hearts Re:coded and remove all negative status effects. They are each worth 160 Munny.

Kingdom Hearts Birth By Sleep

 * Panacea: Scrapper (30%/25%), Spiderchest (20%/30%)

Kingdom Hearts 358/2 Days

 * Panacea: Possessor (30%), Soldier (30%)

Kingdom Hearts 358/2 Days

 * Panacea: A chest at The Palace during Mission 15; a chest at the Tram Common during Mission 17; and two chests during Mission 20: one Under the Tracks, and one in the Tram Common.

Kingdom Hearts Birth by Sleep

 * Panacea (Terra): Chest at the Fountain Court at the Radiant Garden; chest in the Gizmo Gallery at Disney Town; and a chest at the Skull Rock Entrance in Neverland.
 * Panacea (Ventus): Chest at the Mine Entrance/Mine in Dwarf Woodlands; chest in the Aqueduct at the Radiant Garden; chest in Pete's Rec Room at Disney Town; and a chest along the Sea Coast in Neverland.
 * Panacea (Aqua): Chest at the Front Doors at the Radiant Garden; chest in Pete's Rec Room at Disney Town; and a chest at the Rainbow Falls Base in Neverland.

Kingdom Hearts 3D: Dream Drop Distance

 * Panacea (Sora): Chest at the Docks; chest at the Solar Sailer; chest at the Rectifier 1F; chest at the Ocean Floor; chest at the Fields.
 * Panacea (Riku): Chest at the ; chest at the Solar Sailer; chest at the Rectifier 1F; chest at the Monstro: Mouth; chest at the Monstro: Cavity; chest at The Opéra.

Etymology
A is a fictional medicine that was supposedly a cure-all that could extend one's lifespan. It, in turn, got its name from the Greek goddess of healing, Panacea.