The Skull Kid in Hyrule Warriors Legends has an interesting story. It is often associated with mischief and has a somewhat dark and mysterious nature within the game's lore. Generally, it's involved in various quests and battles that are unique to the game's storyline.
Iron Fist belongs to Marvel. He has his own unique story and powers within the Marvel comic book world, and has also appeared in related media adaptations.
Iron Man's fate varies in different Marvel Comics story arcs. But in certain ones, unfortunately, he does die. It often depends on the creative direction and plot developments.
There are a few versions of the Iron Fist character in Marvel Comics. But it's not a straightforward number as it depends on different storylines and continuities.