Dream-Kadoodle

The Dream-Kadoodle is a device created by Professor Von Schlemmer to work opposite to his other invention, the Dream-A-Ma-Jig.

Description
Instead of bringing dream characters into the real world, this machine allows real people to enter into the dream world, known as Dreamsville. Sonic and Tails used it to find the Dream Meister so she could tell them how to defeat the Boogey Man. Coconuts also went through it in attempts to trap Sonic in Dreamsville.