Earth Force

Earth Force is a mysterious mystical power locked away within the Earth itself, usually depicted in-series as a pillar of steam emerging within the planet (such as seen during the Changeman roll call) and a bolt of lightning descending to the Earth. According to legend, many people have gained access to the power in the past, becoming creatures read in legend. Though the power seemed merely fiction, commander Yui Ibuki saw this as a possible trump card for the management of the Gozma Empire, which he knew was coming to the Earth to conquer it, and formed the Dengeki Squadron to train soldiers with potential to use it and to find the source of Earth Power, giving the squadron watches to capture the power when found. When five of his soldiers were bathed with Earth Power during the Gozma invasion, Ibuki proved his theory and began to use the Changeman created through the power and his training to fight the alien threat. Although the Changeman can fully harness the power, overexposure and overusage can rip their bodies apart without rest.

Other planets
A similar power exists within all beings the Changeman encounter throughout the universe, each of which is tied to their home world. Notables that assist the Changeman include the powers of planets such as Rigel, Amanga, Merle and Heath.