Reality Machine is a giant, anthropomorphic rice cooker that generated things off of pictures that are placed into it. It was invented by Senbei Norimaki, and brought Goku and Kid Buu to the Dr. Slump universe.
Senbei was originally going to use the Reality Machine to generate a woman out of a Dirty Magazine, but while he was interrupted by the phone ringing, Arale and Akane Kimidori put a picture of space and the manga page the scene was taking place on in it instead, causing trouble for Senbei.
The Reality Machine later makes an appearance on the cover of the chapter "Affairs of the Heart!"
Dr. Slump remake
In the Dr. Slump remake, Arale puts the last volume of the Dragon Ball manga, "Goodbye, Dragon World", in the Reality Machine, and a black and white version of Goku and Kid Buu fighting each other comes out of it.