The Brain Drain Machine places its victim into a hypnotic dream state, showing them nightmarish scenarios that push the victim into submission. The end result is the victim's mind being left blank and open to Robotnik's commands.
Sonic and Tails were captured by Robotnik and subjected to the Brain Drain Machine. Sonic's dream placed him in the life of a human boy named Erin who refused to eat eggs for breakfast. In this dream, Sonic knocked himself out trying to save his neighbor from bullies. When Sonic woke up, restrained in his bed, his mother came to feed him a bad egg. It was then that Sonic realized the truth of his situation and broke free of the machine, forcing Robotnik to retreat and release Tails.