I'd like to meet the person who made these level recommends because they need their kneecaps broken with a bat. Trainers on the road to Central having two Yarimon, ones a level 15 and ones level fucking 41 or some shit. The recommended level to fight them is the same as their lowest Yarimon. How fucking retarded. Is the dev trying to incentivize you to use cheat tackle or some shit? I refuse to because I want to play the game normally, but you shouldn't make retarded design choices like that. Otherwise what's even the point of calling the difficulty normal?
Tbf, the possibility of seeing the Trainers levels is an indication of how strong that trainer is. Meaning, some trainers aren't meant to be challenged that soon.
Although...there are ways to "cheat" the fights without Cheat Tackle.
Status are stackable and hurt like hell....like, stupidly strong. Get yourself a Messa and spam Dark Realm for that -8 hit and spam status (either status moves or moves with status as secondary effect, like Old Scar Incision, Shadow Edge, Sorcery Vortex and all the likes). Add the fact that you can spam spawn mushrooms and buy stat items for 500 iirc, with a bit of luck, you can even defeat a couple of star trainers before reaching Harbor Town