The Dreamwish-O-Tron 5000 was a device invented by Dexter that when worn while asleep can make one's fondest dreams and desires come true. Dexter had invented this device for the sole purpose of finally being rid of Dee Dee for good. Its first appearance was in the first issue of the IDW Comics storyline of Dexter's Laboratory.
Once activated, the device will alter the reality of the user to change or get rid of anything they desire. The device will then alter the memories of everyone in the world with the exception of the user.
Once Dexter activated his device for the first time, he happily began to enjoy life without Dee Dee, but as time passed he realized that he was nothing without her. Luckily for him, he programmed the device to never completely erase anyone and instead send them to a new reality that might suit their preferences, but the result is that the person in question will lose all traces of their original identity and memories, as was the case with Dee Dee, who now lived on a tranquil girly fantasy world as its new queen.