This was a request by chimneyy. Enjoy!
Despite being called "King of the Scrap Heap" by Renegade Raider and Sparkplug, there have been times where Rust Lord didn't feel like it. To be frank, he lived in the worst part of the island next to an abandoned cemetery and miles and miles from the nearest popular attraction. He had been around for a while then; he had seen many things come and go. A prime example was the set of houses that used to be right in front of Junk Junction. Although they were broken down, he was able to clean them up enough for himself and his sisters to live in. Then one day, they just...vanished. Just like that. They fell asleep in beds and the next day they were on the ground. Castor didn't know anything about it; although he knew a vanishing spell, he would never pull a prank like that...he was too old and jolly.
As previously mentioned, Rust Lord was the elder brother of Renegade Raider and Sparkplug. Previously residing in Lucky Landing, he served as a technician for most of the machinery on the island. Often called in for help from various islandfolk, there was no technical problem he couldn't solve. Broken fan? He could fix it. Air conditioner on fire? Child's play. A car malfunction? Fixed in less than fifteen minutes. Combine his sensational work with his affordable prices to fix things, and you've got a thriving business. Rest assured, he quickly made a fortune. His reputation was only furthered when he introduced the island to various gadgets that could help them in their day-to-day life. He was responsible for the creation of contraptions such as the Driftboard, the Quadcrasher, and the Baller.
Powder and the Alpine Aces gladly volunteered to test the Driftboard on the hills they slide on. Burnout agreed to test the early stages of the Quadcrasher. The test subjects for the Baller included Zoey and Dusk. Zoey being the innocently childish one was eager to try it but Dusk wasn't as enthusiastic (but she was dragged into it anyway).
Anyway, things were looking great for Rust Lord and his sisters. He had saved every cent that he earned and reinvested it back into his personal projects. He aimed to purchase the abandoned mansion west of Paradise Palms so that everyone could have their own space. A way to speed up the process, he believed, was to purchase the junkyard on the farthest west side of the island. It had more metal than he needed. Although it provided subpar living quarters, it was only temporary. Surely enough, he had as much time to tinker with objects as he needed. Sparkplug even got in on the fun by trying to create her first robot.
However...things changed. Not only was the island changing too rapidly for Rust Lord to keep up with the times, but his ideas quickly became, as he believed, pointless. He went into the battle royale looking for issues that he believed could be solved with technical know-how, but every time he entered, he exited disappointed. His constant defeat in and out of the battle royale overtook his reputation as the island handyman and replaced it with a new nickname: Target Practice. Sure, he knew the strengths and weaknesses of each gun, but he did not have too much experience with building to protect himself. On the occasion that he actually did kill someone, he knew that that person would have a metaphorical badge placed on them labelled "Killed by Rust Lord". In addition, he liked to perform a little dance to taunt any enemy that he killed that previously doubted him. That dance, dubbed "Take the L", became one of the most popular jokes the island has ever seen, improving his reputation a little bit more.
But off the battlefield, he still had to go home to two younger sisters that expected something from him. Sure, he had money, but the primary goal was to help the island. Although they supported him no matter what, he offered to give each of them a hefty sum of money so that they could go find their own place to live and to make something of themselves. His offer was met with laughter and refusal from both of them. Sparkplug was close to finishing her first robot, dubbed Kitbash (Kittrash, according to Raider) and Renegade was currently basking in her status as "The Ghost of the Island". It was known that the two of them were Rust Lord's sisters, but Raider only appeared in extremely sparse areas. As a result, anyone who met her and told the story was met with disbelief from their friends.
Their success only spurred Rust Lord on further. He got into as many fights as he could as he searched for problems with different solutions. Along the way, he increased his knowledge of building and shooting; while he definitely wasn't the best of the island, he was quickly rising the ranks. As stated earlier, Rust Lord had seen major changes of the island. He had witnessed a rocket launch with his own eyes, the dispersal of snow across the island in a matter of seconds, the explosion of a purple cube, teleporting the island's inhabitants to a new dimension, and the emergence of a volcano. Surely enough, he had many stories to tell to newcomers.
Citizens like Lynx and Zenith didn't believe him when he told them stories of the past. However, there was always someone nearby to back up his stories, such as Sparkle Specialist or Valor.
Eventually, he stopped fighting, only officially going into the royale when he had nothing else to do. He also started a new business with Sparkplug that created different pickaxes and gliders. Customers could add any decorations that they wanted to their pickaxe, and for a small fee, they would have a brand-new pickaxe of the highest quality. Of course, the two split the profits 50/50.
Rest assured, when people did encounter him on the battlefield, they made sure to make the most of that moment, because no one knew when they would see someone like him again.
Thanks for reading. Who would you like to see a story on next?