Throughout the day today, I was catching the last remaining Pokemon I needed in Brilliant Diamond/Shining Pearl for Legends Arceus and transferred them over to Legends Arceus because I was tired of the chance of finding the last few ones in time-space distortions. These Pokemon was Magnemite. I also went to Shining Pearl and dug up a Shieldon fossil and sent it over to Legends Arceus. A Spiritomb, too, because finding all the wisps was too annoying.
Along the way, I finally caught Enamorous with a copious amount of smoke balls, stealth spray and Ultra Balls. I now have all 241 Pokemon except Arceus, but this boss fight is very difficult. I have to look up the best way to dodge so the god of Pokemon himself doesn't defeat me again.
I really hope using Pokemon home for the last three Pokemon isn't "cheating" I just never got a Magnemite to appear in space time distortions and was tired of blacking out in them. Same goes for Shieldon. I never got one to spawn, so I just gave up on waiting and transferred one in. Spiritomb is also too tedious, hence why I just tossed one in from Pokemon Home.