Feel like I should post this since I’m ecstatic that this happened.
Today I tried getting Zamazenta in a Beast Ball in my 2nd save file. At first I wanted to replay my save to get a Zamazenta with an Adamant or Impish nature since I’d generally prefer not to use mints if I can help it. At the same time, I also thought it would be pretty special to have it in something like an Apricorn Ball, or even better, a Beast Ball. I’ve heard about how hard it would be to catch non-UBs with it. But I decided to try my luck and see if I could get it in a Beast Ball while hopefully also having either of those natures. I had transferred multiple Beast Balls from my original save to my 2nd save (thanks again
@Ashscot for helping out with this!) since I didn’t like the idea of restarting after just throwing the one Beast Ball (or two with Ball Fetch Yamper) you get in a save file.
In the middle of trying, I suddenly wondered if I should settle for Zamazenta having the preferred nature without being in Beast. On one attempt, I got an Impish natured one in a Heavy Ball after running out of Beast Balls and I wasn’t sure how long I’d be doing this since I wanted to do other things in the game. I decided to keep trying since I didn’t gather all those Beast balls just to give up so soon. Overall, it probably took around 15-20 tries until I successfully caught Zamazenta in a Beast Ball. I kept getting it asleep at 1 HP by having a Gallade with False Swipe and having a Shiinotic using Spore. Every time I had to make sure Behemoth Bash wouldn’t faint Gallade or Shiinotic, so I had Bisharp to take the hits until the PP ran out.
Once I got Zamazenta with Beast Ball, I was prepared to look at its summary and see that it wasn’t a nature I wanted. When I saw the screen with its stats, I saw the highlights and jumped. Red on attack and blue in Sp. Atk?! It has Adamant nature!!! I didn’t expect to get that on my first Beast Ball catch and couldn’t believe it! The IVs look pretty good too, with “best” in HP, Attack, and Defense, “pretty good” in Sp. Defense and Speed, and “decent” in Sp. Attack. But I was planning on using Bottle Caps anyway.
So overall, I tried to get Zamazenta with a good nature and in a Beast Ball, and I got it within an afternoon. Was very lucky and I will cherish it forever