Ether

The Ether (エーテル) 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.

Kingdom Hearts Birth by Sleep

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

Kingdom Hearts 358/2 Days

 * Ether: Watcher (30%) in Mission 20, and Mission 23; Snapper Dog (30%) in Mission 27, Mission 28, Mission 29, Mission 31, and Mission 35; Snowy Crystal (50%) in Mission 35; Minute Bomb (20%) in Mission 17; Bulky Vendor (60%) in Mission 7.

Kingdom Hearts Re:coded

 * Ether: Soldier

Kingdom Hearts 358/2 Days
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.