The Automatic Back Scratcher, Hair Comber, Nose Picker, and Ukulele Tuner 9000 is an invention created by SpongeBob and Patrick to show to Sandy's bosses that Sandy is a genius so she does not have to leave Bikini Bottom.
This invention appears to be pretty worn out as it even has a patch on it. It also as a small chair at the bottom and has "Dr. Professur Patrick Patrick Rulez!" written on it.
Tunes your ukulele
Feeds you delicious pudding (SpongeBob doesn't remember that part of the machine.)
Role in the Episode
It was only seen in the episode "Chimps Ahoy." Reginald, one of the chimps, was the first person to try it out. The machine worked at first, but had many malfunctions. After the bosses found something else to take, Sandy and her friends are left to decide what to do with the "contraption," and Patrick decides to use it on himself. He finds it torturing but exciting.