I bred 2 Slowpokes today with fairly good IVs. Actually one had amazing IVs, but stupid neutral (Hardy) nature, while the other had good (bold) nature. Not 100% sure which one to use, probably the bold one, but yah, just want to ask, in case there's a case for the Hardy one:
Hardy's IVs:
HP: 30-31
Attack: 9-10 (Doesn't Matter)
Def: 31
Sp. Attack: 29-30
Sp. Def: 30-31
Speed: 27-28 (Doesn't Matter)
Bold's IVs:
HP: 31
Attack: 25-27 (Doesn't Matter)
Def: 30-31
Sp. Attack: 28-29
Sp. Def: 22-24 (... if only it was also 30-31 like the Hardy one)
Speed: 2-4 (lol)
I guess it doesn't really matter, but it's going to be for the Calm Mind set.
EDIT: Forgot to say (though I figured it's probably obvious), it is going to evolve into Slowbro, not Slowking.