Also known as: ジェネレーター・レックス, Generator_Rex
Generator Rex is an American animated superhero television series created by Man of Action for Cartoon Network.
It's about Rex Salazar, who can transform their limbs into various mechanisms to combat EVO.
The series had a crossover movie with Ben 10: Ultimate Alien called Ben 10/Generator Rex: Heroes United. The 2016 reboot had a special episode revealing that the setting of Generator Rex is part of that universe.