Give me some advice please guys
I just recently started replaying Pokemon White and I didn't really get into the whole natures and breeding thing until recently. If I wanted an Audino with a specific nature, am I just going to have to go catch a shit ton until I get the nature I want by chance? Is there really no other way to easily increase your chances for the nature you want? I'm aware of the synchronize trick but that requires you to have the nature you want on the synchronize Pokemon

I've already filled half a box with audino