No, you cannot play as Malon in Ocarina of Time. You only play as Link.
Dark Link makes his appearance as the sub-boss of the Water Temple
yes in the water temple as a adult
Well obviously link! Zelda is a girl lol
In Ocarina of time, you will eventually reach the Water Temple. Dark Link will be the semi boss. A tip to defeating this foe would be to use the megaton hammer.
The easiest way is to keep hitting him with your Megaton Hammer until he dies.
After you get all three spiritual stones, obtain the Ocarina of Time, learn the song of time, play it at the temple of time, and pull the blade of evils bane.
The adult one. To be more specific, the adult Link that you play as in Ocarina of Time.
You collect the Longshot in the room of the Water Temple after defeating the sub-boss, "Dark Link."
Use the Megaton hammer, he can do any sword move you can.
It's somewhere in the Water Temple, possibly after you defeat Dark Link
There was no Hero of Time before the Link in Ocarina of Time. Link IS the Hero of Time. But the Link before Link in Ocarina of Time is the first Link to use the Master Sword,and he's in Skyward Sword. Confusing?