Thief

Thieves are human enemies that try to steal treasure from Link by bumping into him, which knocks the treasure everywhere for them to pick up.

The Legend of Zelda: A Link to the Past
In The Legend of Zelda: A Link to the Past, thieves are recognizable by their long, olive-colored hair and angry faces, and appear only in the Lost Woods. They can be knocked back or stunned by any of Link's weapons but cannot be defeated, nor can they damage Link when they scatter his Rupees. A friendly thief with red hair can be found and spoken to in a tunnel under a hollow tree stump, which is said to be their secret hideout, and tells Link one of their members is said to be staying near the entrance to the Desert. A yellow-haired thief operates a treasure chest minigame. They seem to be part of a group formerly led by Blind the Thief. In the dark world, their counterpart is the Pikku, which appears in the Village of Outcasts.

The Legend of Zelda: Four Swords Adventures
In The Legend of Zelda: Four Swords Adventures, thieves appear in the corrupted Kakariko Village, where they now steal Force Gems, but otherwise act the same. Now when they are stunned, they can be picked up and thrown, which must be done to get all of them into a pen. Most of them can be recognized by their red bandanas, causing them to somewhat resemble Jim of the Bombers. Three, however, look like normal townsfolk, being a young girl, an adult man, and an old man. Once all of them are captured, the person inside the nearby house takes down his fences so the Links can continue. Additionally, Tingle complains of a thief stealing his Force Gems in Tingle Times: Volume 6, which is located at the entrance to the village.

The Legend of Zelda: A Link Between Worlds
Thieves as enemies do not appear in The Legend of Zelda: A Link Between Worlds. However, the Shady Guy's design seems to be inspired by that of the thieves in A Link to the Past, due to having similar hair and features. His counterpart, the Thief Girl, wears a mask of the Pikku once she escapes the Thieves' Hideout, referencing how they were the thieves' counterpart.

BS Zelda no Densetsu Inishie no Sekiban
In BS Zelda no Densetsu Inishie no Sekiban, thieves have dull red hair and appear in dungeons to sell things. The first one appears selling groups of ten arrows for 50 Rupees in the Eastern Palace. Another is in charge of the Shooting Gallery minigame, replacing the Ghostly Proprietor. Yellow-haired thieves appear in caves and tell Link things, similar to in A Link to the Past. Sometimes, they give Link large quantities of Rupees, akin to Secret Molblins.