is that i have a careful pokemon that almost never misses moves even 1 hit k. o. attacks and i have a lax pokemon that misses a lot even moves with acuraccy of 95
You just are very unlucky with that Pokemon, as Nature does not affect accuracy. However, you might have the ability Hustle, whichlowers the accuracy of moves. If not, just unlucky.
the only thing i know of the natures affect is are the stats (eg. adament nature raises attack but lowers sp.attack).mabey your lax nature pokemon has the ability hustle