In "The Eighth Digivice", her barefeet are briefly shown.
In "Gatomon Comes Calling," her barefeet are shown as she answers the door.
In "The Battle for Earth", Yuuko's barefeet can be seen wearing sandals.
Digimon Adventure 02
In "Ghost of a Chance", her barefeet can briefly be shown when she opens the door to Tai's room.