Boss Remains

The Boss Remains are quest items in. They are Masks that imprison each of Termina's protective deities, the Four Giants. When Link defeats a dungeon boss, he acquires one of the four Boss Remains and is transported to the Chamber of Giants, where he encounters one of the Four Giants.

Quest Purpose
After starting a new three-day cycle, the remains allow Link to teleport to the boss room of each temple without navigating the entire dungeon again.

The Boss Remains represent the dark masks that imprisoned each of the Four Giants within the evil bodies of their respective captors. Despite the fact that they are masks, the Boss Remains cannot be worn by Link; they are, however, worn by four Moon Children, while the fifth wears the Majora's Mask.

Odolwa's Remains
Odolwa is the masked jungle warrior boss of Woodfall Temple. When Link cleanses the Woodfall Temple for the first time and acquires Odolwa's Remains, the first Giant is freed from his captivity and meets Link in the Giant's Chamber, where he teaches Link and Tatl the Oath to Order.

The child on the Moon that wears Odolwa's Remains will play Hide and Seek with Link in a Woodfall-themed dungeon with usage of the Deku Mask after he trades him one mask.

Goht's Remains
Goht is the masked mechanical monster boss of Snowhead Temple. When Link cleanses the Snowhead Temple for the first time and acquires Goht's Remains, the second Giant is freed and meets Link in the Giant's Chamber, where he reveals the Giants' nature as protective gods.

The child on the Moon wearing Goht's Remains will play hide and seek with Link in a Snowhead-themed dungeon with usage of the Goron Mask after he trades him two masks.

Gyorg's Remains
Gyorg is the gargantuan masked fish boss of Great Bay Temple. When Link cleanses the Great Bay Temple for the first time and acquires Gyorg's Remains, the third Giant is freed and meets Link in the Giant's Chamber, where Tatl implores the Giants to intervene on behalf of the world on the condition that she and Link free the last Giant.

The child on the Moon wearing Gyorg's Remains will play hide and seek with Link in a Great Bay-themed dungeon with usage of the Zora Mask after he trades him three masks.

Twinmold's Remains
Twinmold is the giant masked insect boss of Stone Tower Temple. When Link cleanses the Stone Tower Temple for the first time and acquires Twinmold's Remains, the four and final Giant is freed and meets Link in the Giant's Chamber, where the Giants agree to help Link and Tatl but ask them to forgive their friend.

The child on the Moon wearing Twinmold's Remains will play hide and seek with Link in a Stone Tower-themed dungeon for him to defeat in his Hylian form after he trades him four masks.

Trivia

 * Odolwa's Remains appear in Anju's Grandmother's story about the Carnival of Time. It is attached to the side of the festival tower.
 * The icon for Gyorg's Remains is not properly centered in the Quest Status screen in the Japanese 1.0 version of Majora's Mask.