I want to replay sun and moon but make it harder however I'm not sure what the best way to do it is.

Just turning off XP Share doesn't really make it any harder unless you deliberately use a bunch of pokemon instead of just leveling only one thing way too high and I'd prefer to have a few easily understood and stated rules to follow rather then having one rule + a bunch of >oh yeah and don't cheat

My current thought is required fights only with xp share on; catching stuff would be done with a specific catch guy with xp share off so you don't get any extra. I dunno how it'd work out XP wise (or what all is avoidable even) but it might be interesting or maybe the xp wouldn't be enough.

Ideally I'd like it to force me to change my team to meet challenges and utilize stuff like status or weather or something besides just speed+power+coverage