The ladybug listening device was an item used by Rex Raptor and Weevil Underwood to eavesdrop on Yugi Muto and his friends. It was a covert listening device designed to look like a ladybug. Rex and Weevil heard of Yugi's Egyptian God cards being stolen and planned to get them for themselves. They placed the ladybug device on the window at Yugi's house and hid outside with earphones and binoculars. They heard Yugi receive an invitation to the United States from Maximillion Pegasus and decided to sneak along, seeing this an opportunity to get rare cards.