 He, Luna, Bud, and Geo usually help test out Tom Dubius's new upgrade for the Star Carrier.Zack is the only one of Geo's immediate friends who has not Wave Changed, against their will or otherwise, though he does get a Wizard named "Pedia" in the third game, thus making a pun with their combined names, "Zackpedia", the name of his website.Pedia is the Wizard companion to Zack Temple.