"When you're hit with a Brainwash Attack, you'll be sent to a place called the World of Mind Control. In the World of Mind Control, you'll face a false version of yourself. Defeating your false self will let you regain control and return to the real world."
The World of Mind Control is a mental realm that appears in Dragon Ball Xenoverse 2.
When a Time Patroller is hit with a Brainwash Attack during Expert Missions, they are transported to the World of Mind Control where they must face off against the doppelgängers of themselves, in order to free themselves of mind control which allows them to return to the real world.