Find... Lightning gem
Find it Visit Space Paranoids or Hollow Bastion later in the game to find one of these. The monsters who hold them are usually Surveillance Robots and the hard-as-nails Armored Knights.
Find... Lucid gem
Find it Go to Hollow Bastion or Space Paranoids and kill either a Bookmaster or a Magnum Loader to make them drop one of these, which is a key ingredient in the Soldier Earring we mentioned earlier
Find... Mythril gem
Find it Like the mythril crystal, you can only get this from random treasure chests, or by synthesizing one yourself. You can use it in free development to make a Mage Earring for Donald.
Kingdom Hearts 2 streamer spends 2 hours grinding a 9999-hit combo, gets enough cash for 1.2 healing potions: "This is possibly the most stressful thing I've ever done"
Kingdom Hearts forced Naughty Dog to go "oh sh*t" while making Jak 2, because Square Enix's character models were so much more detailed that the platformer devs had to change course
