Quick question about IV's. Do they only get passed down from the parent? Or does each generation get IV level up the more it mates?
I have a def, sp A, spd gastly male. But I also have a hp and sp def female thats stats are decent. Is it worth mating them?
You have to have the appropriate items attached to the parent to pass IVs from one generation to the next.
Power Items are like 99% guaranteed to pass IVs, but you can only use 1 or 2 at a time (1 item per parent).
The item you
really want is a Destiny Knot. That passes
up to 5 IVs to the next generation. Only issue it, a Power Item and a Destiny Knot doesn't mix, so when you get that magical 5/6 IV parent, you have to try to get another 5/6 IV parent of the opposite gender with different 5/6 IVs to maximize your chances for that elusive 6/6 kid.
That's why it is a good idea to also Nature breed at the same time.
For example, I have a male Adamant 5/6 Honedge, with HP being the odd stat out. I have a female 5/6 Hasty Honedge, with Sp.Def being the odd stat out. The male has the Everstone and the female has the Destiny Knot, so when I get that magical 6/6 Honedge, it will also have Adamant nature too.