|Voiced by||Daryl Sabara|
Rex Salazar is the main character from Generator Rex and an E.V.O with the power to create a variety of machinery with his nanites, control machines, and cure most E.V.O.s. He is the secret weapon of the international organization known as Providence, which exists to combat the E.V.O threat. Rex's job, along with that of Agent Six and Bobo Haha, is to defeat the more powerful E.V.O.s that appear and cure them.
He and Ben Tennyson (both created by Man of Action) later had a crossover special in which Ben was pulled into Rex's world and joined Rex in fighting a new threat (Rex at first thought Ben himself was the threat when he took one of Ben's alien forms for an E.V.O.).
FusionFallHe is stationed at a Providence outpost in Townsville Park, where his nanites have malfunctioned. He can also be found in the sewers of Townsville Park with his sidekick, Bobo Haha. They were trapped there after chasing Dynamite Rats into the sewer. The only way to access the sewers is by doing a mission for Agent Six. He is also in The Academy with Lance. A Rex Nano was released along with Alien X and Finn.
- His Nano is one of seven Nanos available from a Code.
- His Nano incorrectly lists the B.F.S. as the "Big Freakin' Sword," while the correct acronym is "Big Fat Sword."
- He is the first original Adaptium Nano players get in the game.