Grabbing Life by the Reins
Tired of their constant struggles for superiority, Yveltal finally decides to put an end to his battles against Xerneas, and takes the fairy Pokémon by the reins
"Mmph!"
"Come on, Pet. You can go faster than that."
Xerneas gave another 'hmph' of annoyance while Yveltal laughed. Surely he knew how hard it was to move quickly while crawling on all-fours. The death god's weight seated upon the saddle strapped to his back didn't help much either.
In addition to the saddle, the life god was also sporting a bridle and matching set of reins, as well as a bit set firmly in his muzzle to keep him from speaking. A pink collar with a neon-red "X" printed on the tag was fit snugly around his neck, a symbol of his current status. The reins were held by his "master", his counterpart Yveltal, who was currently sitting upon his back and guiding his movements as he crawled. "Faster," Yveltal commanded as his claw-like tail came down sharply on Xerneas' plump butt. Xerneas groaned into the bit in his mouth, picking up his pace.
It had been one month since Yveltal had claimed him. Tired of their constant struggles for dominance, the death bird had ambushed Xerneas, quickly defeating him before dragging the exhausted Pokémon back to his home. There Yveltal had quickly set to work, fitting the life god with the collar, saddle and reins he currently wore. Too worn out from their battle, Xerneas had simply let his enemy do as he pleased, choosing not to move until he felt the weight of his new master settled upon his back. With a firm tug of the reins and a quick spank, Yveltal soon had Xerneas crawling around like a common ponyta.
Then came the training. Yveltal spent the last several weeks training his new pet on how to behave. How Xerneas was expected to sit and crawl on command, and how he was expected to respond to the reins when Yveltal tugged them every which way. Humiliatingly, Xerneas had quickly grown adept at following his master's orders. Though he had first balked at the reins, the life god soon learned that disobedience was punished swiftly and harshly. It didn't take long for him to give in, obediently crawling wherever his master led him with the reins.
Once Yveltal was satisfied with his pet's training, he began to take him out in public. Xerneas was mortified as he crawled down the crowded streets and winding roads of the Kalos region. The other anthros stared and laughed as Yveltal rode his mount around, and the life god's humiliation only increased when his master would tie off his reins to the posts alongside the feral rapidashes and zebstrikas, further driving home the point that he was no longer a person, but a pet.
"Nnngh," Xerneas groaned again as Yveltal's claw-tail gave his rear another firm spank, sending a fresh wave of humiliation coursing through his body. A month of crawling on all fours, of being tugged around by the bit and reins, of being ridden around like a common beast of burden, and Xerneas was at his wit's end. He was Xerneas, the God of Life! He was strong, he was powerful, he had a type advantage for Arceus' sake! He would not stand for being treated like--
Xerneas let out a humiliating moan as Yveltal spanked him again. "I said faster, Pet," The forced sterness in Yveltal's voice failed to hide his amusement. They both knew the speed at which Xerneas crawled was irrelevant. The death god just enjoyed teasing his bitch.
Another spank. Xerneas picked up the pace, crawling faster at his master's command. He was Xerneas, the mount of Yveltal. He was helpless, he was submissive, and he would continue to crawl around like the pet he had become. Who he had once been no longer mattered. Now all he needed to do was ensure he served his master in every way he could.
Atop the life god, Yveltal chucked as his mount continued to crawl. "Good pet," he purred as he gave Xerneas' plump rear a lighter, more affectionate spank, earning another pleasured moan from his pet. He had been broken so easily, the last remaining traces of resistance already fleeing the fairy deer's mind. A little more training, mixed in with pleasure as a reward for obedience, and Xerneas would truly become nothing more than his submissive pet.