This History Is fairly in depth to explain several personality traits that Izzy and Quirk have.
Family Background and History:
The Sato family has resided in the Johto region for generations. While most of the family has moved out of the area, a few members of the family have stayed where family originated, Azalea town. The family was once made up of wealthy merchants who had decided to settle in the relatively isolated town, feeling that it served as a great place to reconnect with nature. Since then, the family has lost touch with its merchant past, and many of the family members have found jobs in the sprawling urban behemoths around the land.
One couple is all that is left to take care of the family house in Azalea, over the years they had a single son, whom they named Isaiah Sato after his great grandfather who had journeyed to far lands. From a young age Isaiah vastly preferred to be called Izzy, feeling that his full first name was far too formal. The only people that call Izzy by his full name are family members whom knew him well. His parents, often helped with menial things around town, as they did not work. His father and mother made up their minds when he was born, they would try their hardest to raise Izzy in a traditional setting so he could become a trainer. This was interesting, since as Izzy grew up, he was melded with both traditional and untraditional thoughts.
The family Pokémon, was his mother's Haunter, named Langley, whom she had caught when she was a young trainer. Often he watched over the household when everyone was out. Unlike many Haunter, he was a very caring Pokémon, this was in fact the result of the training from Izzy's mother. The only other pokemon in the household was a fairly lazy slowpoke which could be found sunning itself on the porch as well as pestering Langley.
In his younger years:
Izzy was a very curious child, exploring everything that he could. His parents allowed it, as they would just send Langley to watch over him. Though Langley watches him, Izzy has found ways to avoid his babysitter to pursue his explorations. Of course Izzy's curiosity has placed him in dangerous situations many times, form being stung by poisonous Bug Pokémon to falling down the Slowpoke Well and breaking his arm. Through his share of mishaps Izzy has become very keen at patching himself up to hide the bumps and scratches to avoid Langley's detection ultimately avowing trouble with his parents.
Another thing that many of the children around the town would do was to gather at Maisy's house to listen to her grandfather, Kurt, tell stories about past adventures. Maisy was the successor in a long line of traditional Pokeball creators. Though this tradition was often overlooked by many, in lieu of the many different Pokeballs offered by large corporations, Maisy still took pride in her work, keeping the fading tradition alive. Kurt, would revel in his golden years, telling anyone who would listen about the old ways, when Trainers befriended their Pokémon instead of using them as mere instruments. All of these tales had left an impression on Izzy, but none as much as the story
of the Slowpoke tail thieves.
As He grew older, fewer and fewer children would visit Kurt to listen to tales that had been retold many times over the years. One day when Izzy was 8 he had visited Kurt's house to listen to a story, seeing he was the only one, he had figured Kurt would just send him home. To his surprise Kurt still wanted to tell him a story. That day Kurt had a special tale which he had not mentioned prior, about the day a dastardly group who showed up in Azalea to chop off the tails of the many Slowpoke around town. The tale spoke of a young trainer, who had been traveling through the area, assisted Kurt in saving the local Slowpoke. Kurt then stated that this trainer was not like many of the others trainers who had traveled through Azalea. This trainer had forged strong friendly bonds with their Pokémon. This friendship made the trainer stronger than any of the Thugs who had taken the slowpokes, and allowed the trainer to defeat the thugs very easily. "This trainer most likely went off to do great things" said Kurt, wrapping up the story. He left Izzy with the lasting idea that a trainer who can Love their Pokémon through thick and thin will become stronger that those who treat their Pokémon like tools. He rationalized this with the fact that Langley was such a loving and protective Pokémon, because of his mother's friendship over the years.
The Accident and the Academy:
When he Turned 10, Izzy's mother and father had decided he was old enough receive his own bicycle, His mother dug out an old Mach bike from the depths of the house.
"Now remember this bike is very light and fast, the maneuverability is sub-par to say the least.", his mother warned.
After giving him a full lecture on not taking it too fast and avoiding dangerous areas with the bike, Izzy's mom let him take the bike for a spin. Once, Izzy got the hang of riding the bike, he felt it was only natural to try riding the bike faster.
A few weeks had gone by and Izzy felt he had become a pro at riding. He decided to elude Langley and try riding around the slopes near the entrance of Union Cave. Most of the day had gone by and Izzy felt he should begin to head home. Riding as fast as he could, he took a slight curve and to his horror a Geodude was playing in the road. Unable to swerve fast enough, he collided with the Geodude. Izzy was thrown from the bike, and knocked unconscious.
Waking up a day later looking at the ceiling of the Pokémon center, he wondered what had happened… His parents later filled him in that he was lucky enough to have a travelling trainer overhear the commotion and investigate what was going on. He silently made a pact to never ride a bike again then and there.
Izzy spent a little more than a week recovering in the Pokémon center, every day he would watch the trainers and their Pokémon come through, some even with fairly serious injuries, and the Nurses would go about their work with such skill. That was the beginning; Izzy had his first experience in medicine. During that week, he also met Mele Joy, the 8 year old daughter of Azalea's Nurse Joy. She seemed to be a fairly rebellious young girl at the time, not wanting to help her mother; she instead went out and played with the local slowpoke. Once Izzy was out of the Pokémon center, he was ready to start at the Regional Trainer Academy.
Izzy decided that instead of going to the trainer academy to be a Pokémon trainer he would take their Medical courses. It would take 2 years longer to obtain a trainers license but, his passion was to help heal as many Pokémon as he could. His mom greatly disapproved stating that,
"You ought to learn to be an efficient trainer instead".
Most of the time that Izzy spent at the academy studying; the various children in his classes were either part of the Joy family, or trainers learning basic Pokémon medical knowledge. When Izzy had turned 13, He began his last year of classes. There was one single change between the previous two years and now; Mele was attending her first year of classes, and her focus wasn't on Pokémon medicine, like most of the Joy family. She had caught a Bellossom, and decided that she liked to travel more, than working at the Azalea Pokémon center with her mother. This meant that they would graduate together.
Near the end of the year, Izzy had finished his studies and was sure to graduate, so he sat and watched the final exams for the trainers. The trainer final exam was a rather large tournament in which students fight their Pokémon against each other to see who would graduate top class. This is when Izzy witnessed the oddest fight he had ever seen. Mele was in second place, up against the top student of the class, a young boy who had tough Growlithe. Her Bellossom stood little chance, yet when the match began Mele took out a violin, and started to play a tune. Her bellossom began to dance, The Growlithe began to attack, but Bellossom dodged it. Mele hit different notes and as she did, Bellossom began to glow orange. It then charged the Growlithe, the attack was not only a direct hit but, the Growlithe was knocked out in the process.
"Look that's the girl that taught her Pokémon to fight using the music she plays on the violin.", said a student nearby.
"Looks like she's top of the class, I bet she is going to leave and challenge all of the gym leaders in the region one day" Another student replied.
Top of the class, Izzy thought. Well she certainly looks like she deserves it.
The End of the year was nothing special, all of the students graduated; many including Mele, who ran off one the night, left to travel the region. Izzy had a trainer card but, still didn't have a Pokémon to accompany him. Oh well, he thought, one day I will travel to different towns and cities, helping and healing anyone who needed it.
The Pokémon and Trainer meet
Since, he didn't have a Pokémon; Izzy's mother wouldn't let him venture too far from town. Izzy still managed to explore the nearby areas, he began to hike up the slopes around Union Cave, and he could be found enjoying the sunset there, many evenings. This also allowed Izzy to volunteer with the Pokémon center, and as he did, his medical skills got more honed. And over the years Izzy became known as Doc, by just about everyone in town.
Izzy had just turned 15, which was no big deal. The only thing that changed was, Nurse joy decided that he could watch over the Center at night. It was his first night, and Izzy was on edge to do well. He was taking the trash out, when something caught his eye, a small shadow seemed to be sifting through the trash. Izzy moved to see what the creature was, moving into view, he could see that it was a rather small Rattata.
"Hmm, I bet you're just looking for some food" Izzy sighed, he went to grab an extra bowl as well as some food.
He set the food out for the Rattata, and watched the small Pokémon. The Rattata sniffed the food and hissed.
"Aww it's ok little guy, you don't have to worry" Izzy said, gleefully extending his arm for the Rattata to sniff.
The Rattata was surprised, so it dashed a short distance away. After a few minutes, the Rattata began to slowly inch itself closer to Izzy's hand. Once it made its way to Izzy's hand the Rattata sniffed the outstretched hand, pausing for a moment it then turned its attention to the food. As it began to devour the food, Izzy left to finish things he had to do inside. A few hours later, he came back to pick up the empty food bowl.
After few weeks went by, Izzy finally decided to name the little Rattata. He had given it much thought and Izzy decided that it would be best to suggest his name to the Rattata. Upon feeding the wild Rattata, he asked it if it liked the name "Quirk". His friend nodded, becoming from that day on, Quirk the Rattata. They began to bond over the next few months, prompting Izzy to request to have Quirk as his first Pokémon.
Catching Quirk
Details can be found in the sample.
Recent Events and The Beginning of Izzy's Journey.
Recently, there had been a lot of talk regarding strange Pokémon showing up in strange places. Most of the town's people didn't believe it, but Izzy would hear similar observations being made by Pokémon centers around the region.
The family's slowpoke, who always messed with Langley, had disappeared for several weeks; only to return as of late, as a Slowking, whom prefers to be called George. George claims to have been lying about the Slowpoke Well, when he spotted an object in the distance. Waddling over to it, he found that the object was a rock shaped like a crown. When he put the crown on, a Shelder emerged from a nearby pool biting him on the head. He spent a few days wandering about the cave, trying to comprehend what had happened.
George and Langley have since become great friends; they can be often seen strolling through town holding conversations regarding a multitude of things. George has taken up residence in the Sato household, helping with daily duties as well. Though it is quite rare to see a Slowking the people of the town have adjusted, treating George like a towns-person.
Since he had turned 17, Izzy had become increasingly restless, wanting to seek his own adventure with Quirk. His parents have been saying no, so he had been contemplating his options, when he found out about a professor Lyra needing help in Cianwood. He had watched a stranger post the paper on the bulletin board, when he was volunteering at the Pokémon center. He read the flier, containing the professor's plea for help, with it came an incredible idea. If he could convince his parents that Lyra called the center requesting help from someone there, and he volunteered, he could get out of the town and explore the outside world. He was also interested in the Plea for help; Izzy decided that if he could go, he would definitely go to Cianwood first, to offer his help to the professor.
Once he got home, He found his mother and father, in the family room. He then proceeded to tell them, his tale hoping that it would be enough to woo them. Luckily His parents ultimately decided that Izzy could go on his Trip. Izzy began gleefully packing he and Quirk were to depart at once. Once all of his gear was in order Izzy left his house saying goodbye to his parents, Langley, and George. Izzy decided to make 2 stops before he left town. One to the Pokémon center, to thank them for allowing him to volunteer, and the second to Maisy to thank her for the Friend ball she had made him one last time.
Upon entering the Pokémon Center, Izzy was greeted by Nurse Joy. Seeing his full Pack, she asked where he would be exploring with all that gear. Izzy informed the nurse of the details regarding everything.
"So you're going to Cianwood then?" Nurse joy replied almost ecstatically.
When Izzy replied yes, the nurse gave him a letter to deliver to the Pokémon Center in Cianwood. Izzy accepted, thinking that the errand would be no problem at all. He and Quirk then said goodbye to the Nurse and everyone there, hoping to see them again in the future.
Izzy had finally made it to his last stop before he left. Knocking on the door, Maisy answered. Izzy began to thank her for the Friend ball, she had made him a little more than a year prior. After a moment, she looked at him and stated ,
"Why thank you, but you mustn't thank me, I only reflect the vision and urge I see within the trainer's eyes"
He thanked her graciously, and as he left she gave him one last piece of advice, "wherever your journey takes you, don't forget about your roots, once we are forgotten we cease to exist. To be forgotten is the worst tragedy of all."
With that he stepped out of the door and headed into the Ilex forest. Their true Journey had only just begun.