The Sky Spy is a satellite drone used by Cybertronians to assume an alternate mode.
Ectronymous Diamatron landed on Earth and happened to see the Ecto-1 in a sinkhole. Sky Spy performed a fly over and scanned it. Ectronymous assumed Ecto-1 as his vehicle form. He believed he would blend in perfectly then attempted to track down the Cybertronian signal he was tasked with investigating.