Mega-Ether

Mega-Ether is an item found in Kingdom Hearts and Kingdom Hearts II that restores MP, but in slightly different ways. In the first game, it restores 3 MP for each party member, while in the second game it restores the entire party's MP completely. In both games, it can be equipped for use in battle.

Kingdom Hearts
In Kingdom Hearts, they can be found in scattered chests and Trinities located in several Worlds, and can also be Synthesized from List III by using:
 * 3 Blaze Gem
 * 3 Frost Gem
 * 3 Thunder Gem
 * 5 Bright Shard
 * 1 Bright Crystal

Kingdom Hearts II
In Kingdom Hearts II, they can be found in chests, and can be Synthesized; their recipe is unlocked by first successfully making a Mega-Potion, then making one with the addition of a Serenity Stone.
 * 3 Mythril Shard
 * 1 Power Shard
 * 1 Blazing Shard
 * 1 Lucid Shard
 * 1 Serenity Stone