The Grim Adventures Of Billy and Mandy Episode 6 A Dumb Wish Episode Title: A Dumb Wish Episode Description: While Spring cleaning in the middle of November, Billy takes an old, cursed lamp from Grim's trunk. When he gives it a rub, he releases the curse Grim had warned them about: his own mother. Having three wishes to make, Billy wastes his wish by wishing to know what to wish for. Mandy wishes Billy and Grim would "shut up", which causes both of them to zip their lips, so Grim never gets to make his wish. Then, Mandy decides to make the last wish to whoever makes her the happiest. In the end, Mandy wishes everyone in the world would go away, causing them, except Mandy, to disappear, which she is glad about.