Fallen Adventurers are the piles of bones located mainly in the Temple of the Ocean King in Phantom Hourglass. They give Link hints or information about the floor he is on. The three Fallen Adventurers in the entrance give Link hints about the entire Temple of the Ocean King, for a Rupees. Many Fallen Adventurers tell how they died, so that Link can avoid a similar fate. On a few occasions, Ciela will call Link over to a Fallen Adventurer, which will give him vital information. These Fallen Adventurers are identical to the collapsed bodies of Stalfos.
The following section is not part of the Zelda canon and should not be taken as such.
In Link's Crossbow Training, Skeletons appear in the Arbiter's Grounds: Ranger stage and the Skulltula Forest: Ranger stage. Link can shoot the Skeleton with the Crossbow for one point per hit up to six shots. Upon the sixth shot, the Skeleton will break and Link will be given 5 points instead of 1, with a total of 10 points. If Link shoots the Skeleton with a Exploding Arrow, he will obtain 6 points and destroy the Skeleton instantly.
In the Arbiter's Grounds: Ranger stage, two Skeletons lie at the back of the path taken by Link behind a roasting Bullbo and a watchtower used by a Bulblin. In the Skulltula Forest: Ranger stage, one Skeleton lies behind a Scarecrow in the back of the forest, while another rests along the left wall of the starting area. The Skeleton along the left wall will also make an Orange Rupee appear when destroyed.
The following section has content which has neither been confirmed nor denied as canonical by Nintendo.
Skeletons can be found in the Desert and Kakariko Crypt in Cadence of Hyrule. Both variations of Skeleton can be destroyed. Some Skeletons found in the Desert have blue Butterflies resting on them to signify they cover Stairs leading down into Caves.