>>26888744>>26888859Most natures boost one stat by 10% and lower another stat by 10%, with a few natures being entirely neutral. You're going to want one that boosts Attack or Speed without dropping either stat. Once you get an Absol that has the correct nature, give it an Everstone before sticking it in the daycare; that way, it'll be guaranteed to pass down the correct nature.
IVs are a little trickier to breed for, though you can have a parent hold onto a Destiny Knot to ensure that 5 IVs are passed down instead of 3. The other 1 to 3 IVs are randomly generated.
IVs most likely won't matter in the main game anyways, so don't stress out too much; unless you get absolutely shit IVs, they don't become a big deal until Battle Resort.
good taste btw 