(going by the manga) since they didn't explain fierce deity, or barely explained him, they say that fierce deity fought majora over 10.000.000 years ago so he's pretty old
The Fierce Deity glitch allows you to turn to Fierce Deity Link outside of boss battles. There are a number of ways to do this; the most-well known involving a glitch in Sakon's hideout.
you cant fierce deity link is only in majoras mask
We'll never know, since Fierce Deity Link is only in Majora's Mask. It certainly sounds like a good idea for a fanfiction, though.
Fierce Deity Link is a character from Zelda Majora's mask. You can get the mask by collecting all the masks there are in the game. It is a strong mask that turns you into Feirce Deity Link. He is wacko white version of adult link.
There is no Known cheat that allows you to get the Fierce Deity Mask with out collecting all the Masks.
You can't, as it's in Zelda Majora's Mask, also for the N64.
There is no fierce deity link in SSBB, only Toon Link and TP Link. The easiest ways to unlock these two are through the Storyline, except you need to revisit the forest stage where you obtained TP Link and enter a secret door (Once the entire storyline is finished!) to unlock Toon Link. Otherwise, Toon Link requires something like 4000 battles.
Ahoy, there. o/ Man, you can not even enter the Forest Temple, as a Child.
Here is a non gameshark code for majora's mask, after getting the fierce deity's mask and saving your game go to ikana canyon and go right there is a boulder wall now use the attack roll at the side of the rock and you will go through it now your in the hideout oh make sure its the final day at night before doing this.. Now go inside the door and step on the blue switch while wearing the bunny hood now take kafei to the other room when there press Start and choose the fierce deity's mask and choose it to the C button that's for the bunny hood when you return as link he will become fierce deity's link! Now your fierce deity's link forever.. at least until the moon falls.
complete all four dungeons on the moon giving up all 26 mask. do this befor you fight majora
There isn't one
No, Dark Link is not in the game. The closest you'll get is Fierce Deity Link, which you get the mask for after getting every other mask in the game and giving all the non-transformation masks to the children on the moon.