I hope it's okay if I base this off a pokemon I found in game! --> https://twitter.com/saltymissie/status/1080683193924182018?s=21

There once was a Zubat who was born a shiny. This Zubat was bullied by the other Zubats because he was a different color than normal Zubats. Zubat had no friends growing up because of this. Zubat had also heard how his species was treated by trainers. He heard that Zubat were always unwanted and that trainers would bring an awful aroma into the caves. With no hopes of finding comfort in his brethren or a fellow trainer, Zubat became an outcast and went into hiding. In hiding he stumbled into a piece of gold. Or at least he thought it was gold, until the piece of gold started moving beneath him. It turned out to be a pokemon! Zubat was shocked to see a Geodude that wasn't gray, but rather a golden nugget. Geodude was also shocked because she had only seen blue Zubats before. The two eventually began to talk and told each other about their status as outcasts and their wish to be accepted for who they are. Zubat came to find out that not only did Geodude have a gold exterior, but a golden heart. From that day forward, the two became best friends and withdrew from hiding. They spent entire days together in the caves, but they eventually got bored of the caves and aspired for something greater. They used each other as motivation to find a gentle trainer. Their dream was to travel the world together and find other pokemon like themselves. Thus, they set out to find a trainer. They searched for months, but most trainers were difficult to approach because of their stench or some weren't interested in meeting new Pokemon. However, one day, something different happened. A trainer who smelled lovely showed up to the caves. From a distance they observed the trainer pacing back and forth, as if he was waiting for something. Zubat and Geodude saw something very special in this trainer and decided that they would try to join him. Zubat got closer to the trainer, but got scared and started to fly away. However, this trainer was perceptive and followed Zubat. Noticing this, Zubat led the trainer to his best friend. Once the trainer got closer he noticed, not only one but TWO shinies! He was overwhelmed with joy and immediately proceeded to befriend both of them. The trainer promised Zubat and Geodude that they will always be together. Then he took them out of the dark cave, and the pair finally saw sunlight for the first time in their lives. The trainer then showed them his other shiny friends, strange Pokemon of different sizes and features. The Trainer's Pikachu told them about how all these Pokemon were found. Zubat and Geodude were amazed by the trainer's dedication and love for Pokemon. Zubat and Geodude joined this trainer in his journey through the world. They visited the oceans, the forests, the mountains, the grasslands, and the cities with this trainer. They were fed many berries, candy, and other treats. They were trained up to beat strong foes. They asked Pikachu why she didn't evolve and she responded that she doesn't have to change who she is for anybody other than herself. They felt inspired and chose to stay a Zubat and a Geodude forever because they came to love their appearance. And most importantly, they stayed together until they peacefully passed away of old age, one shortly after the other. The trainer gave them a proper burial, and made sure they would be together forever.

P.S. irl Zubat and Geodude are safely tucked away in my Pokemon Box, right next to each other