Kingdom Key D

This alternate version of the Kingdom Key is called Darkside. Darkside was found in the Realm of Darkness. Since Darkside is a reverse colorization of the Kingdom Key, it is believed that these two are the original keyblades. 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. This Keyblade was shown in the secret ending of Kingdom Hearts II called "Sunset Horizons" with Sora's and Riku's Way to the Dawn as being the only 3 with keychains on them, showing that they are genuine. In Kingdom Hearts II, he is not shown wielding any weapon, except Darkside and his hilarious wits in Timeless River. This keyblade can also fire a holy magic spell called Pearl. This reflects the fact that no matter how deep the darkness there is always a bright light that shines within.