It's dark link and just get more keys.
when your in the water temple find and kill mirror link and the treasure is the longshot
No. You fight him in the Water Temple.
dark link in the temple of time is a cheat, so if you don't know the cheat, you can only fight him in the water temple.
Dark Link makes his appearance as the sub-boss of the Water Temple
yes in the water temple as a adult
In the water temple as adult link. (not the jabu jabu dungeon) You get the updated hookshot in the water temple, but you get the first one as adult link in the kakariko graveyard under one of the gravestones.
find the temple in lanaryu lake hint is in the deepiest water
Dark Link is located in the water temple in lake Hylia. First you must play the Serenade of Water to be transported to the lake. Then equip the Zora tunic and using the iron boots sink into the small puddle remaining in the now dried lake bed. This is the entrance to the water temple. Dark Link is located in a room with a diamond and several dragon heads in the center. Equipping the hammer for this battle will make short work of dark Link.
Obviously not. They had never seen each other before the Water Temple, where they fought to the death.
you need to get the zora tunic
Yes. He is the mini boss in the water temple.
in arbiters grounds, snow temple, temple of time, and city in the sky