Brain of Oz
Rez's Serveant - The Brain Of Oz
"I will destroy you!"
Vital statistics
Title Boss
Gender Male
Race Brain
Faction Rez
Health 5
Level Lizard of Oz
Status Deceased
Location Slappy Valley

The Brain of Oz is the second boss of Gex 3: Deep Cover Gecko and must be defeated in order to gain access to Funky Town. The location of this fight, most obviously, is within the Emerald City's castle from The Wizard of Oz (hence the pun in the level name). During the fight, Gex takes the form of the Tin Man.


Not much is known as to the Brain of Oz's history, but he presumably served as Rez's right-hand after Mooshoo Pork's passing. In any case, he surrendered the Blue Paw Card upon his defeat. Oddly enough, the Brain of Oz predates Deep Cover Gecko by a year. In the special ending of Enter the Gecko, one of the "Enemy Ideas" showed a design for what may have possibly been a prototype version of the boss which never made it into that game but has done in the third. The same concept design can be seen in the credits of the third game. Likewise, in the "Mazed and Confused" secret level of Enter the Gecko, a brain-like entity emerges from the Rez Tower once Gex destroys its outer casing.

Design and inspiration

He appears to be an alternate version of Oscar Diggs (who, as his alias of the Wizard, often used a projective hologram of himself in the Oz stories and their adaptations), albiet a malignant one, though his own appearance partly resembles that of the Martians from Mars Attacks!.


Rez's World - Boss Channel - Lizard Of Oz - Lions, Tigers, And Gex

Lizard Of Oz Logo

The Brain of Oz, as stated above, serves as the game's second boss, with his boss channel "Lizard of Oz" becoming accessible once 22 remotes are obtained. Upon his defeat, Funky Town becomes accessible.


Lions, Tigers and Gex
Brain of Oz Arena

Brain of Oz's arena

You simply dodge the fireballs he spits out and any Rezlings that appear (the pre-battle hint says "Watch out for pesky Rezlings"). It's a little difficult considering that the fireballs home in on Gex and the Rezlings follow him. A cannon will appear in a random area of the stage and Gex needs to go on it and fire the cannonball on the Brain of Oz. Repeat until he is defeated.


  • In the series, Brain of Oz is one of two bosses that Gex kills without using his tail, other being Rez himself.
  • He was originally intended to be a boss in Gex: Enter the Gecko.