I just caught Ho-Oh for the first time, I then proceeded to check its IV's(I was going to soft reset if it didn't have good IV's) when I checked its IV's I thought the IV calculator I was using was broken, so then I tried another and got the exact same IV output from that one. Here are the IV's
Nature: Adamant
HP IV's: 28-30
Attack IV's: 29-31
Defense IV's: 29-31
Special Attack IV's: 7-8
Special Defense IV's: 24-25
Speed IV's: 29-31
I was so relieved when I saw them, I was prepared to soft reset for hours, but as it turns out I didn't need to soft reset at all =D I didn't use my master ball either(saving for Lugia)