I used a MASTER BALL on Ho-oh. I don't mind, I don't care, and the following paragraphs will explain why:
You see, I bought HeartGold because of the new breeding mechanic that helps in IV Breeding. I told myself that once I beat the Elite Four, I'll start breeding. I really wanted to get my Water Team ready as soon as possible, especially since I stopped breeding for a few months so that I could go wait for HeartGold.
... Sure, when I played HeartGold, I took my time. I rushed Gold version back then, so I wanted to savor the adventure this time with HeartGold. I even spent some time trying out that card flip game in the game corner. Managed to get to the highest level, I think. But anyway, I lost all my patience when I got to Ho-oh. Seriously, it wouldn't stay inside the ball! So there. I used that Master Ball on him. Do I care? No. I've kept my patience ever since I started the game. Using that Master Ball was a small price to pay for everlasting sanity.
Did I ever finish breeding my Water Team? Yeah. Pretty much. (Now, if only the 5th Gen came later... But oh well...)