|Location||Peach Creek Commons|
|Voiced by||David McCallum|
Professor Paradox is a time-traveling scientist who is over 100,000 years old, and one of Ben Tennyson's allies. Using the time-traveling knowledge he gained from a disastrous experiment fifty years ago, he helps Ben and his friends with his knowledge of the past, present, and future.
Professor Paradox first in appeared in FusionFall during the 2010 St. Patrick's Day event. He gives out the mission "Time Traveler's Task" where he asks players to collect three items, a giant rubber-band ball, Ship, and the Archimada Book of Spells, assuring them that these will be instrumental in upsetting Vilgax's latest plot. This was later used as the introductory part of the "FusionFall Adventure: Alien Abduction". As part of the FusionFall Adventure, Paradox received three placements as an NPC. His default station being at the Cul-de-Sac in Peach Creek Commons, he could also be found at City Station on the platform next to Ship, and inside Ship's Interior in City Station. Besides giving out "Time Traveler's Task," he gave out the AmpFibian Nano mission.
In Redo's version, Professor Paradox has been moved from his original location in Peach Creek Commons, now being located at the Sunken Mall in Townsville Center. However, his other two locations remain the same. Due to the higher level and distance of his new location, "Time Traveler's Task" has been modified to be a level 15 mission instead, and all associated tasks of said mission are done in the surrounding areas.