In the climax, Rex uses the master control to send out a worldwide "cure" command, effectively curing every E.V.O. (Exponentially Variegated Organism) on Earth.
To defeat the Consortium and fix the world, Rex must risk losing his memories again, as he has to access the master control code within himself to shut down the Meta-Nanites. Generator Rex - Season 3Eps19
Rex must face the Consortium in a final showdown to decide the fate of the world. Plot Summary In the climax, Rex uses the master control
The series ends with a world largely free of E.V.O.s, though Rex retains his own abilities and decides to continue protecting the world from any remaining threats. Key Characters in the Finale Endgame, Part 1 | Generator Rex Wiki | Fandom In the climax