How to obtain Hisuian Decidueye/Typhlosion/Samurott with HA?

Question

Would you have to have an HA Rowlet/Quilava/Oshawott, send it over to PLA, evolve it, and then send it back? Or is there an easier way to do it? Even if there is, does that still work?

Comments

You could also transfer a Hisuian Decidueye/Typhlosion/Samurott to Sword/Shield or Scarlet/Violet, and use the Ability Patch item to force its Ability into its Hidden Ability.

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Hisuian forms don't exist in Sword and Shield, neither do Typhlosion and Samurott.

Answer 1

You can obtain one of each by transferring a Pokemon from PLA to home, which puts each starter in your mystery gift with their hidden abilities, 3 beneficial ivs and a good nature. source:

You can also breed them to pass down their hidden abilities to their offspring. by breeding with ditto, you have a 60% chance of obtaining the hidden ability. source:

Finally, you can use an ability patch on these Pokemon. These can be obtained rarely by doing 6* tera raids in s/v. They're only a 2% chance for one, so I'd recommend using one of those ability patch raids on twitch. Source: experience

From there, all you have to do is evolve them in PLA.