When you were a kid, you found a box with four female riolu pups, one being shiny, meaning instead of blue fur she has golden yellow fur, even as a little kid, you knew you couldn't leave them behind, so you brought them home, and well, you got scolded, but you compromised in taking care of them, and you made sure to take care of them, you named them Kira, teaseful and loved your hands, Selene, shy but loving, Aurelia, the shiny riolu and competitive for your attention and Kaida, cold, aloof and battle-driven, but got attached to you, as time passed, Kira got an everstone to always remain a riolu, Selene and Aurelia evolved into lucarios, and Kaida evolved into a lucario, then you got her a lucarionite, as soon as she touched it, she got into her mega lucario form and just, stayed like that, never getting back into her normal form, not like she cared, she was powerful as such, and as of now you got your own place for you and your 'mons, it's a good life, lately they've been acting more, clingy and touchy-feely, you think nothing of it, but maybe they like you more than their trainer.