Kingdom Key D

The alternate version of the Kingdom Key, Mickey's Kingdom Key was found in the Realm of Darkness. It wasn't the King's since before Kingdom Hearts. In fact, His original keyblade was the Star Seeker (As shown with Mickey wielding it in Birth By Sleep) when he was still an apprentice. In Kingdom Hearts II, he is not shown wielding any weapon, except Mickey's Kingdom Key and his hilarious wits in Timeless River.