Xevians

The Gamps/Xevians are humanoid clones of the supercomputer GAMP, hailing from the planet Xevious, though originally from Earth. Under the leadership of Tak, who in turn serves as GAMP's second-in-command during the "Dimension" saga, the Xevians aspire to reclaim Earth, via invasion—seeing as they had to leave the planet just before the Ice Age. This race is shown to be ruthless, capable of reducing entire cities to ruins (such as the city in Zim's dimension), and the sheer numbers that make up GAMP's fleet and army are almost beyond comprehension; armed with countless vessels and motherships, as well as high-tech weaponry for both their ships and selves, conquering the alternate dimensions proves relatively simple, when not being hindered by the efforts of the alliance—or the mysterious Operation Solvalou.

(editing shall recommence soon)