Omega-Xis (read as omega-zis),[1] known as Warrock (ウォーロック Wōrokku) in Japan, is the secondary protagonist in the Mega Man Star Force series. He is an extraterrestrial being originally from Planet AM, and one of the survivors of the planet's destruction. He moved to Planet FM to live incognito afterwards. Prior to meeting Geo Stelar he had fled from Planet FM after stealing the Andromeda Key, and for a time inhabited Geo's Transer. Currently he exists as Geo's Wizard in his Hunter-VG. Sometimes he's called by his nickname, Mega (Rock in Japan).

Source: https://megaman.fandom.com/wiki/Omega-Xis