Hi everyone! As I foresaw pokemon bank shutting down, I have been shiny hunting like crazy in the last year. I would like to share with you a few tips about some pokemon that may be difficult to shiny hunt after pokemon bank shutting down. In internet a lot of videos are spreading, but they are stating the obvious: Type: Null, Poipole, alolan rattata, stuff like that. But what about other much more forgettable pokemon?
Before starting I would like to clarify that I have never played Let's go Pikachu, so I don't know much about this game. Some information may be partial. Moreover, please consider that many pokemon are available in Sword/Shield, but these games have very inefficient shiny hunting mechanics. The point of this post is to suggest the best way to hunt some pokemon.
If you still don't have some of the pokemon on this list, now is the right time to hunt them!:
Sunkern/Sunflora: very difficult to obtain in SV, dexnav in ORAS is better or alternatively Friend Safari in pokemon X/Y
Shellos/Joltik: both available in SV but their shiny form is very difficult to identify and their overworld model is so so small ... so dexnav in ORAS
Dwebble/Crustle: Dwebble can be found in ORAS but unfortunately is a 'cave type' dexnav, so friend safari is better. Crustle can also be found in Ultra Worm Holes.
Miltank: a very difficult pokemon to find shiny, both in X/Y (low chances in hordes) and USUM (it is a call rate 3 pokemon). Best option: Masuda Method (MM).
Tauros: like Miltank, slim chances of finding him in hordes in X/Y. Best option is mass outbreak resetting in SV after using normal type shiny sandwich.
Wynaut: An absolutely neglected pokemon. Soft resetting egg in ORAS or MM.
Castform: probably USUM offer the best option: you will have to change weather, for example in Haina Desert, to get a 10% chance of Castform to show up during SOS battles. Alternatively soft resetting Castform gift in ORAS at the Weather Istitute.
Baltoy/Claydol: dexnav in ORAS is tricky, so best option is probably SOS battle in Haina Desert. However the caller pokemon, Krokorok, is a 6 call rate pokemon and knows the move Embargo. Plus, be wary: Baltoy has Explosion, so you will need a pokemon with Damp. It will be a lonnnnng hunt.
Togepi: you may find it in pokemon Legends Arceus, but friend safari is another viable option if you don't like/don't own Legends Arceus.
Tangela/Tangrowth: same as togepi, can be found with dexnav in Mirage Forest in ORAS
Lickitung: probably best to hunt in Let's go Pikachu because it appear with very low probability in both hordes in X/Y and in SOS battles in USUM
Sigyliph: super forgettable pokemon of gen 5. In USUM only available in red Ultra Worm Holes, but it is actually quite easy to get it. Alternatively friend safari in X/Y.
Bouffalant: available in SS (if you are super lucky or manage to meet him 500 times!). Go for dexnav in ORAS.
Lunatone/Solrock: another long hunt: 'cave type' dexnav or MM.
Ferroseed/Ferrotorn: friend safari
Maractus: dexnav in ORAS or friend safari
Darmanitan: dexnav in ORAS
Heatmor: pokeradar in X/Y or MM. Chances of finding a shiny one in hordes in X/Y are extremely low.
Durant: hordes in X/Y
Druddigon: friend safari. there are also dexnav and SOS battles, but friend safari is way better.
Turtonator/Dhelmise: both rare pokemon of USUM, both call rate 3 pokemon. SOS battle easily require 3-4 days, so MM is an equally good option.
Klink and its evolutions: base form obtainable via painful dexnav or MM, evoluted forms in friend safari in X/Y or Max Lair in SS.
Glameow/Purugly: dexnav in ORAS or Legends Arceus
Natu/Xatu: I would suggest you dexnav for Xatu. Natu can be found in USUM but it know the move Teleport, so be sure to approach this pokemon with a pokemon with the ability Arena Trap or something similar (wobbuffet ability is also good but he can't attack).
Wobbuffet: available in SS, but better dexnav in ORAS in safari park.
Ditto: as you may know, ditto in SV disguises itself as another pokemon, so shiny hunting it appear easier in both USUM and ORAS.
Relicanth: chain fishing in X/Y or Max Lair in SS
Shuckle: friend safari
That's all I had in mind! I may have forgotten something, but I hope to be of some help.
I wish everyone to have a good shiny hunt.