The Hypnotist is a Rabbid! is a special mission on Ratchet & Clank: Return of Chairmen Drek, it can only be unlocked by a special code that you must type the password on your card inside the box on the 'Restricted' part of the website, the player must find The Hypnotist on Planet Burg inside the park dome, it turns into a boss fight when he gets out a toilet plunger, screams 'Bwaah!' and eye's glow red, when Ratchet defeats him, however, it was a robot controlled by Mech Chairmen Drek. They find the real Hypnotist in a Cinema on Planet Daxx.
There's also a skill point for unlocking and defeating this mission with only the wrench.