What's the name of the black memory eraser?

Men in Black: Global Hunt. According to relevant public information, in the film, the protagonist M (tessa thompson) was erased by the memory eraser after joining the organization of men in black, in order to protect the existence of aliens from being discovered by ordinary people. Men in Black: The Global Pursuit, starring Valkyria's Chris Hemsworth and tessa thompson as agents H and M respectively, was released simultaneously in North America and China on June 65, 2009. The film tells the story of alien immigrants disguised as creatures on the earth and living together with human beings, while the Interstellar Immigration Bureau is responsible for supervising their every move on the earth to prevent evil aliens from destroying the earth.