Ether

The Ether (エーテル, Ēteru^?) is an item that restores 3 MP or magic points in Kingdom Hearts. However, in Kingdom Hearts II it fully restores MP (if there is some left in the bar) or it can be used to reduce the MP Charge Gauge. In Kingdom Hearts Chain of Memories and Kingdom Hearts Re:Chain of Memories, an Ether card quickly reloads all magic cards. In Kingdom Hearts 358/2 Days, it's in the form of an item panel which restores one cast of each magic you've installed. In Kingdom Hearts Birth by Sleep, it restores 30% of the user's Focus Gauge. In Kingdom Hearts Re:coded it raises Data-Sora's clock level by one.

Drop

Ether: Blue Sea Salt (40%/50%), Red Hot Chili (40%/50%), Yellow Mustard (50%)

Ether: Watcher (30%),^[1] Snapper Dog (30%),^[2] Snowy Crystal (50%),^[3] Minute Bomb (20%),^[4] Bulky Vendor (60%) ^[5]

Ether: Three chests at the Sandlot during Mission 4; chest at the Agrabah Gate during Mission 16; chest at the Agrabah Gate during Mission 18; chest at The Palace during Mission 19; chest at the Courtyard during Mission 22; chest in the Side Street during Mission 23; chest at the Agrabah Gate during Mission 24; two chest in the Entrance Hall during Mission 27; chest in the Entrance Hall during Mission 28; chest in the Secret Passage during Mission 29; chest in the Agrabah Street during Mission 30; three chests in the Ballroom, one chest in the Secret Passage, and two chests in the Entrance Hall during Mission 31; chest at the Sandswept Ruins during Mission 34; chest in the Secret Passage during Mission 35; chest in the Courtyard during Mission 38; chest in the Entrance Hall during Mission 50; chest at the Queen's Castle during Mission 51.

Ether (Terra): Chest in the Audience Chamber and the Hallway in Enchanted Dominion; chest in the Vault at Dwarf Woodlands; chest in the Ship Corridor in Deep Space; and a chest in the Cove in Neverland.
Ether (Ventus): Chest on the Mountain Trail, and in the Deep Woods in Dwarf Woodlands; chest in the Mousehole at Castle of Dreams; chest on the Forbidden Mountain in Enchanted Dominion; chest at Central Square at the Radiant Garden; and a chest in the Cove in Neverland.
Ether (Aqua): Chest in the Deep Woods in Dwarf Woodlands; chest near the Waterside in Enchanted Dominion; chest at Central Square at the Radiant Garden; chest in the Control Room in Deep Space; and a chest along the Seacoast in Neverland.