Genex

Genex are a series of mostly Machine-Type monsters that have an affiliation with the various Attributes that exist in OCG, as hinted on the flavor text of "Genex Controller" and its trump cards, "Hydro Genex", "Thermal Genex", and "Geo Genex". Most of their effects revolve around "Genex Controller", usually getting the aforementioned card in the hand or on the field for quick Synchro Summonings. "Genex" monsters were introduced in "Duel Terminal - Invasion of Worms!", with further support added in "Justice Strikes Back!!".

Their names seem to be derived from several forms of energy development (Hydroeletric, Geothermal, Solar etc).