G- cards are an miniature Archetype of support cards for the "Gadget HERO" and "Gadget STAR" Archetypes respectively. Each "G-" card has a primary effect as well as a secondary Graveyard effect designed to recycle the card.

Though "G-MAN" and "G-UNIT" are also technically "G-" cards, there are no direct support cards to utilize those names. Furthermore, while "ALPHA-MAX" is not counted as "G-" card, it is still one of the cards possible to be searched via "Chrome City".

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