Sky Powered is the combined form of Dai Atlas and Sonic Bomber. Their ability to combine apparently stems from the power of their friendship. Sky Powered can move at a top speed of Mach 17 (that's roughly 3.59 miles per second).
Zone story pages
When confronted by Predaking, Dai Atlas shouted "Let's do this!", encouraging Sonic Bomber to combine with him into Sky Powered. Targeting Predaking's wings, Sky Powered thoroughly trounced the Demon General, who supposedly excelled at aerial combat.