Gadget
The Gadgets are a series of machine-type monsters whose effects allow players to search for relevant Gadget monsters from their Deck once a Gadget is summoned.
The Gadgets include Green Gadget, Red Gadget and Yellow Gadget. They are all found in the Machine Re-Volt Structure Deck.
They appeared in the anime in the Ceremonial Duel between Yugi and Atem in the last episodes.