Mr. Zurkon started as a device in the Tools of Destruction series costing 5,000 bolts, but he couldn't be upgraded. 4 Mr. Zurkon devices were aloud per user.
In A Crack in Time, Mr. Zurkon cost 6,000 bolts and received status as a Gadgetron weapon. When upgraded, he becomes the much more powerful, much more bluer Zurkon the Destroyer.
In All 4 One, when a number of Mr. Zurkon are released by a team, they will now work together and when upgraded he becomes Elite Mr. Zurkon and becomes a full ally.
In Full Frontal Assault, Mr. Zurkon still sees himself as a member of the Q Force (although officially a weapon). When he is upgraded, he becomes Alpha Zurkon.
Into the Nexus features Mr. Zurkon with a spookier voice to support the spooky theme of the game. His family also comes out to fight in battle aiding Ratchet and Clank.