The omnitrix wielder in Jasper (omnitrix user male reader x Arcee) +18

In Jasper, Y/n has always lived on his own after his parents passed, and his sister blamed him for it while riding his skateboard at a skate park by himself. a meteor crashes. when he goes to investigates it turns out to be a robot from space defending humanity. now he helps out with a watch that's able to turn him into aliens.