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 and manga in the Ceremonial Duel between Yugi and Atem.

When players reference "Gadget Monsters" they are typically referring to the monsters listed above, but technically "Gadget Soldier," "Gadget Hauler" and "Gadget Driver" are treated as a "Gadget" monsters since they also have "Gadget" in their names, and as such they can be used with the "Gadget" support card, "Boot-Up Soldier - Dread Dynamo". However, "Gadget Soldier" has no distinguishing advantages beyond this and the other two are intended purely as support for "Morphtronics" monsters.

Since their release, Gadgets have also become support cards to the "Ancient Gear" monsters, due to "Ancient Gear Gadjiltron Chimera" and "Ancient Gear Gadjiltron Dragon," which require Tribute Summoning by tributing Gadgets of particular colors to gain certain effects. As Gadgets are all EARTH-Machines, like Ancient Gears, as well as the fact that Ancient Gears need ready access to Tribute Fodder, the two archetypes merge well.

When used on their own, Gadgets are typically too weak to ensure surviving battle with any but very weak monsters, so a commonly used support card with them is "Gaia Power." Using Gadgets ensures that there will always be at least one more monster in the user's hand, and provides a form of Deck Thinning that allows a greater chance of drawing a needed card. To go with their searching capabilities, "Double Summon" or "Ultimate Offering" are commonly used to allow their user to swarm the field with Gadgets.