|Series of Origin||Goop's World|
|Based On||Wizard costume from Goop's World: Opal HQ|
|Unlocked At||Level 25|
In episode one (Swords and Sorcery) of Goop's World: Opal HQ, Grex must find pieces of a wizard costume to sneak into the Enchanted Tower, in order to find out where the king of the castle is being held.
- His default appearance; a blue robe.
- Green robes.
- Brown robes.
- White robes.
- Strangely, although Grex has his robotic body in Goop's World: Opal HQ, the Wizard Disguise in Toshiko Crash-Up is depicted with Grex in his living body.