If you play through Days and unlock Mickey as a playable Multi player character...then you can clearly see the his Keyblade is called
Kingdom Key D
Well I only got to borrow my friend's DS for the week which gave me enough time to beat the game lol
That makes sense. But in a way, I'm still half-correct though because Kingdom Key D obviously stands for Kingdom Key Dark.
Anyway, this thread is pretty pointless right now... surprised it hasn't been closed yet.