I made a pokemon Antagonist for the exact depiction of Missingno that sorta goes through that same story. Here’s the whole tale
So basically long before even professor oak or lance became champion of Kanto there was a whole tournament in early Kanto to determine the regions first champion. The trainer you see here,Blank was one of the first champions to ever participate and dominate the tournament. They had top tier battle skills and even used battle mechanics and techniques so powerful they were considered cheating at the time… ((though these mechanics nowadays in the present are a lot less uncommon and are seen as legal to use at leagues nowadays)). So by that their status of champion was taken away and they even had all of their pokemon confiscated and Blank wasn’t heard from again.
After years now in the present day of the pokemon world,Blank comes and sees the changes in battle mechanics that is a lot more utilized in the Pokemon world and the league ((even some unique mechanics that they had used in the past)) but they were mighty envious of this thinking to themselves “If I can’t use new Techniques to win Pokemon battles then nobody should be enjoying it”. And had formed their own evil team with people who shared this common belief of what Pokemon battles used to be (( similar to how the original Pokemon games were with red and blue which pretty much was held together by scotch tape and glitter glue))… and came the evil team Team Virus;who are kinda the textbook definition of Old School Gen-1ers.
And if you couldn’t tell from the Dex Entries already,The whole Missingno Legendary I made is the key to accomplishing Team Virus’s goal
by C02BluJay