In the manga, the priest before Karim judged Tragoedia using the Millennium Scales. Winged Kuriboh, known as the White Feathered Spirit, was weighed against the Feather of Ma'at. The White Feathered Spirit represented the sin in Tragoedia's heart, while the feather represented righteousness, truth and order. Tragoedia's sins greatly outweighed righteousness, truth and order, causing the White Feathered Spirit's end of the scales to immediately hit the ground. The sins were so strong that Winged Kuriboh turned black.
This section is missing information from the Yu-Gi-Oh! GX anime.
In the anime, Yugi Muto gives it to Jaden after the latter bumped into the former in a big hurry. Yugi also said that he felt that the card wanted to be with Jaden. After obtaining the card, Winged Kuriboh became Jaden's Spirit Partner and often appeared alongside Jaden, particularly to express concern. Sometimes he would appear when Jaden needed him the most, like when he was in a tough situation, or to tell him the card he will draw could help him. In episode 4, Ms. Dorothy gave Jaden "Winged Kuriboh LV10", along with "Transcendent Wings", to which he used to defeat Chazz. Winged Kuriboh will sometimes hide behind Jaden's head after being frightened by something. During season 3 Winged Kuriboh would sometimes fight with Jesse Anderson's spirit partner, Ruby Carbuncle. In the manga, Jaden also has a Winged Kuriboh LV9 which he summons in his battle with Seika Kohinata. He uses the card Alchemical Experiment to summon it. By doing so, he wins the Duel.
Winged Kuriboh, despite being one of Jaden's main spirit partners never made an appearance in the movie Bonds Beyond Time.