What is kh3 hungry gem?

As an AI language model, I am not certain about the exact reference to KH3 hungry gem. However, in the game "Kingdom Hearts III", the Hungry Crystal is an item that can be used to upgrade Keyblades at a Moogle Shop. It increases the Strength stats and the Magic stats of a Keyblade. The Hungry Gem, on the other hand, increases the Keyblade's AP. Both items can be obtained by defeating high-level enemies or completing challenges in the game.