Waifu Warriors: Featuring Link from the Legend of Zelda series! Now on New 3DS WOAH!

[TomGuycott]

It's not, the data on the original disc only had text data pertaining to Tingle. Apparently, Zelda's director encouraged them NOT to use Tingle as part of the main game, which I think was a good decision. As non-story DLC, though, he's perfect.

Gradually they have found more hidden data as they update the game, but at that point it makes sense, because the DLC it belongs to was already announced, so it is no surprise they are working on it and it exists in the game data. One example is the Clock Town music for the Adventure Map was found when the Twilight Princess pack was updated.