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In Kingdom Hearts, it restores three MP for each party member, while in Kingdom Hearts II it restores the entire party's MP completely. In Kingdom Hearts 358/2 Days, it restores one cast of each installed magic to every party member on the map.
Kingdom Hearts II
Kingdom Hearts 358/2 Days
The Mega-Ether can be synthesized for 1800 munny once Roxas is promoted to Novice rank.
- 2 Hi-Ether