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Mech is one of the elements in Prodigy. This element has been added in the version 1.25.3 for the new pet Big Hex, so there is currently no main zone for this element. There doesn't seem to be any specific spells for this type of element, as Big Hex is the only pet in the game consisting of this element yet only uses Storm moves. Mech is more powerful against Storm type pets but weaker against Ice type pets even if it uses Storm spells.