OH, and I like to point out one other thing.
When we RP here, we try to be pretty realistic. Levels don't exist, neither do EVs or IVs, as game mechanics don't have a place in a world where, if it were ever reenacted in real life, wouldn't ever be a thing. Also, plot devices, like achieving a rare item by someone important seeing your "potential" is a very wish-fulfilling trope and it is difficult to make a character in this environment when we are exposed to being OP literally in the first hour of a Pokemon game. Most of the time, we go by the anime of all things, while also ignoring plot armor and the fact that Pokemon can't learn more than four moves, as it is extremely unrealistic for these Pokemon to only remember four moves. They may also use "attacks" that aren't really attacks, just assets from the Pokemon's body the Pokemon may use (like Ash's Pikachu being able to chew through rope in several episodes due to mouse teeth being sharp). Also, combining attacks to make cool combinations are encouraged.
So basically what happens in the anime are what we go by for the most part, while also making sure we try to stay realistic. A Pokemon can have more moves, it would just have moves that would be stronger than its other moves due them training in those moves more often and using them more often than the others (like Shadow Ball doing less damage than Shadow Punch due to the Pokemon using and perfecting Shadow Punch more so than Shadow Ball). Its other moves may also have a chance of failing if they aren't that used to using the move.
Also, Champions and Elite Four members are extremely hard to come by and their pay-grade is way above anyone else. Most Champions I notice tend not to battle other trainers, due to those trainers being highly inexperienced and the chance of paparazzi bothering them and tabloids trying to make them look bad for the drama. Elite Four members are no different. They are essentially treated as celebrities, as not many people can be as strong as they are (although, their values are probably better than most celebrities we have today). If you want to make a character who is a Champion or an Elite Four member, they better have a lot of character development during their history to become one of them because that is extremely difficult to pull off well and not make it seem like a Mary Sue/Gary Stue. Plus, most Champions and Elite Four members won't be around kids who are just starting out on their journey, unless there is some plot armor very good reasons why they are there.
Just some things I wanted to point out because I do see this in people who start out here or mistakes I have seen in people who are good at RPs, but tend to make OP characters due to not seeing the line between making a realistic character and making a character that is a mirror from the games (me included, I'm not safe from this either XD).