Three Knights is a collaberative fanfiction by Bert Van Vliet, Amanda Stair and Craig Reed that crosses their respective BGC fanfictions (Bubblegum Zone, Bubblegum Avatar and Bubblegum Crisis: The Next Generation) by having their avatars, each of whom plays the role of fifth Knight Saber in their own dimensions, teamed up in a fourth dimension to investigate a dimensional anomaly on behalf of the White Guardian.