You don't unlock him he is one of links alternate colors.
Chat with our AI personalities
Do you think Link is a girl? Dark Link is Link's evil shadow, who will be the same gender as Link.
Tael is Dark Link's fairy's name.
Yes, you can unlock Dark Kahn, but it is extremely hard. You must complete arcade mode with all 22 (the starting 20 and 2 that you unlock) characters on the hardest difficulty without using a continue. If you can do that, you will have Dark Kahn as a playable character.
You've gotta unlock both Hero and Dark Gardens.
Only with gameshark code