I posted Dark Link along with Link sorry it was short, I was about to leave on a very long car over night trip and would not be able to post, as it stands Dark Link cares not for Ganondorfs plans but will follow them to the letter and has sensed out Zant and Midna. Link has now entered Hyrule castle, through the garden... Again, anyway he will more than likely hide there and try and see if he find a way towards the private rooms to see Zelda, if there's one thing we know Links good at it's being ignored by guards when they should have seen him.