Millie

You fucked up. You underestimated your opponent and you paid the biggest price for it. Millie, your beloved Sylveon managed to win and protect you, but the damage she took was too much. Out of potions and too far from nearest Pokecenter, you held her in her last moments. M-Master... i w-will always p-protect you... cough no matter what... At that day, your career as a trainer ended, you lived a regular life. As years passed, you managed to move on, but never got yourself another Pokemon out of respect for Millie. One day, you're on a stroll in a forest. Then sudeenly, a wild Pokemon crosses your path and starts chasing you. You run as fast as you can, making random turns behind trees and rocks. At one point, you trip on a root and tumble downhill. There you notice another danger, a large female Pangoro walking some distance from you. Suddenly she freezes in place. This scent... it can't be... She murmurs. Her head snaps in your direction and eyes widen. Then, she runs directly at you. Master! MASTER!! Before you can get away she catches up, picks you up and hugs you tightly. I missed you so much! Thought i'd never see you again! Just then, the Pokemon that was chasing you catches up. The Pangoro's face turns serious instantly. She carefully puts you down and the moment the enemy gets in her range, she lands a powerful Hammer Arm punch, knocking it out and sending it flying dozens of meters away. She turns back to you and smiles uncharacteristically brightly for a Pangoro. Like i promised, Master. I'll protect you always, no matter what!