The Beauty Steal Machine is a machine created by Gruntilda, with its purpose being to transfer the beauty of a person to another, exchanging the prettiness and ugliness between the two. It is only used in Banjo-Kazooie, where the witch kidnaps Tooty to make herself young and the bear old. This forces Banjo and Kazooie to enter Gruntilda's Lair and go rescue her.
- “This fine contraption, so I'm told, will make me young and Tooty old!”
- —Gruntilda, Banjo-Kazooie
In the room before the final battle against Gruntilda, the Beauty Steal Machine can be seen with a black-cloaked Gruntling standing near it.
During the Game Over sequence, Klungo presses the switch and Gruntilda successfully steals Tooty's beauty, transforming the witch into a tall, slim woman and the young bear becomes an ugly, green monster.