[Discuss] What are some special/atmospheric hunts for different Pokemon? (Especially legendaries)

I'm trying to fill my living dex with hunts that are interesting or unique in different ways. So far, a few that come to mind with the games that I have (Gen 6 and onward, as well as VC Gold and Crystal and soon LeafGreen) are:

• Surfing Pikachu from USUM

• Hat Pikachu from USUM

• Ho-oh, Lugia, Suicune, and Celebi from Gen 2

• the Regis from Crown Tundra

• Articuno, Zapdos, Moltres, and Mewtwo from either Let's Go or the Gen 1 remakes

• Dialga, Giratina, Uxie, Azelf, and Heatran from BD (as well as the mythicals, but those are the only ways to hunt them and only Arceus is repeatable on a different file)

• Game Corner pokemon

• Island 3(?) Hypno

• BDSP Rotom and Spiritomb

• Gift Blitzle and Munchlax from Scarlet/Violet

• Ultra Wormhole Ultra Beasts

• Pokemon Go Meltan/Melmetal, Gimmighoul/Goldengo, Galar Legendary Birds

• 3 Segment Dudunsparce and Family of 3 Maushold

• Level 100 Magikarp

• Berry Patch Crabrawler

• Masuda Method Gen 7 Dusk Form Lyconroc/Own Tempo Rockruff (bred from the event one)

• Heatmor and Zangoose/Seviper from Hordes

• Gen 2 Breeding Pokemon

• Odd Egg Pokemon

• Burmy/Wormadam and Cherubi/Cherrim from shaking trees

• Eon Ticket Latias/Latios (though, I would need to restart/get a new copy of ORAS)

• Friday Drifloon and Tuesday(?) Lapras

• Let's Go Alolan Pokemon Trades

Are there any others that come to mind? Any interesting methods or notable places to get Pokemon that I haven't listed?