The Master Control is a program/mode found in the Omnitrix and Ultimatrix.
How it worksEdit
It adds great powers like access to all 1,000,910 aliens in the Codon Stream as seen in Ben 10: Alien Force, and instant changes and unlimited timing in Back With a Vengeance. It can be unlocked by a special code or voice command by Azmuth, as seen in War of the Worlds: Part 1 or in a rare case by hacking as seen in Inspector #13 when Inspector 13 hacked and breached all 3 firewalls of the Ultimatrix.
- Ben could re-unlock the Master Control by using brainpowers of his smartest aliens, such as Grey Matter, Benvicktor, and Brainstorm. This can be seen in the episode Ken 10, where Ken uses Grey Matter's intellect to unlock the Master Control. If Ben had thought of this, then he and Kevin wouldn't have had to hack the Omnitrix in Vengeance of Vilgax Part 1 and Kevin wouldn't have been mutated for the second time.