Clutterfunky

Y'all were right about Charlotte being ridiculously hard, I ended up over-leveling my pokemon so that they could just tank the hits and relying solely on faith that they'd obey enough of my orders to win, surprisingly my Whiscash was the OG for the battle and obeyed nearly every order and won it for me. Despite the Pokemon being 10+ levels higher than the cap, she still knocked out most of  my Pokemon. That's insane. Even the one that I tried to cheese it with by taking it to level 100 (took forever, by the way.), although I basically just used that one as a stand-in to use healing items instead of attacking.

Like, I'm honestly baffled as to how anyone can beat her normally with the pokemon at the level cap. Did I do something wrong? Is it because I don't understand how EVs and IVs work? I literally couldn't knock out even three of her pokemon before my entire team was wiped out. I noticed that with the pokemon I've used since I got the level mods, on the EV/IV tab they all have like, 0-5 out of whatever number for each stat. I assume that's bad? I assume the level mod is what destroyed that? I don't know what it means though and I don't know how to make it go up without stat boosting items and I'm really worried I've ruined my ability to complete the game without having to cheese it like I was forced to with Charlotte.