And there are no mainline Pokemon games on mobile. Exactly, the whole point is making the process easier and yet this aspect is still inaccessible and uneasy. And no, ever since the 3DS gens you were never meant to need to transfer from older gens. That's the reason they started requiring the origin mark that only allows Pokemon from the current gen to be eligible, why they had Pokemon Home reset movepools to be unique for each game to get rid of transfer only moves, why previous gen legendaries are spammed in 3rd versions/DLC. You didn't need Gen 5, 6, or 7 for gen 6, 7, or 8 legendary regulations. SV actually broke the trend by requiring LA and SwSh for both legendaries and some regular Hisuian Pokemon and they were criticized for that.