To create an "authentic feel" for the cloth and textiles, the graphics were created by using digital photographs of fabric, which were placed under polygons.
This is the only game so far to have an "ability" specifically made for underwater purposes.
The titular use of the word "yarn" refers to both definitions of the word; the actual material of the game world, and that the game is a story narration.
This is the first title in the series to feature a voice actor narrating the game.
This game retains a few elements exclusive to the anime, such as the inclusion of "poyo" in Kirby's vocal exclamations and the use of "-zoi" after some of Dedede's dialogue in the Japanese-narrated cut scenes.