I’ve yet to see anyone attempt to answer this, but here goes:
in Pokémon Let’s Go you are able to catch Large or Small Pokémon. When placed into HOME, these values are retained.
Then, when transferred to Sword or Shield, the height is reverted to the average height of the species. When placed BACK in HOME, the new average value is what’s maintained, and the Pokémon no longer has the original LGPE height value.
My hypothesis is that the values are reset back to zero in SWSH, but I have no verifiable way to test this hypothesis. Would anyone with the proper tools to research this be willing to help me? The chain would go something like this:
>Catch a LGPE large/small Pokemon
>Transfer to HOME
>Transfer to SWSH
>Record its size value in PKHEX
>Transfer back to HOME
>Transfer back to SWSH and record again in pkhex taking note on the height/weight values.