The Synchro Cannon is a large, powerful cannon that is mounted on a base equipped with hover capabilities for limited movement. The Third Invasion Fleet sends one to Earth days ahead of the main assault. It is not known how many were produced. Stick’s resistance group discovers it and uses it briefly to attack an Inbit force before destroying it to prevent the Inbit from capturing it.
Special thanks to The Ultimate Mospeada Home Page for screen captures of the Synchro Cannon.