Kupo Coin is an item in Kingdom Hearts III. It allows the user to restore HP once it reaches 0.
Only one Kupo Coin can be held at a time. When holding a Kupo Coin, it will automatically activate once Sora's HP reaches 0, and restores half of Sora's maximum HP, and cures him of status ailments. Once the M.O.G. Card is obtained, Kupo Coins fully restore Sora's HP, restore 100 MP or 50% of the MP Charge gauge, and cure him of status ailments. The Kupo Coin does not activate when the HP of a Gigas, the Leviathan, or the Black Pearl reaches 0.
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