Gloria was created to be the ultimate weapon, a hybrid of Mewtwo and Mew, having the strength and form of the former combined with the power and personality of the latter. Unfortunately for the scientists that created her, she had other plans…
After escaping from the lab she set out to find her own way in the world, and upon seeing Trainers for the first time, battling and capturing Pokemon, training them and going on a journey together, she became inspired to try that for herself! No, not letting herself be captured and becoming their Pokemon, but becoming a Trainer herself.
Using her strength and power, she easily defeated the first Trainer that caught her eye, stealing his clothes then using her power to modify his Pokeballs so that they could capture Humans and transform them into Pokemon for her team.
Ever since then, she’s been on a journey to be the very best, like no one ever was, battling and capturing humans, and training them to one day become the world’s greatest Trainer. Though she still has a long way to go… and plenty more Trainers to battle and capture.