Differences between L1 at Gen 7 and Gen 8

Gen 7 vs Gen 8 Movepools in the early LU:

So, from G7 to G8 we had a movepool change!

I'll be using Polteageist as my example. Let's consider Sinistea's movepool:

1 	Astonish
1 	Withdraw
6 	Aromatic Mist
12 	Mega Drain
18 	Protect
24 	Sucker Punch
30 	Aromatherapy
36 	Giga Drain
42 	Nasty Plot
48 	Shadow Ball
54 	Memento
60 	Shell Smash

Polteageist picks up Teatime as an Evo. Move (so also as a Heart Scale move), and it also picks up Strength Sap as a Heart Scale move. Finally, at Level 66 it learns Curse. I'd expect something like this in Gen 7 as the updated movepool:

1*	Teatime
1*	Strength Sap
1 	Astonish
1 	Withdraw
1 	Aromatic Mist
1 	Mega Drain
Evo	Teatime
6 	Aromatic Mist
12 	Mega Drain
18 	Protect
24 	Sucker Punch
30 	Aromatherapy
36 	Giga Drain
42 	Nasty Plot
48 	Shadow Ball
54 	Memento
60 	Shell Smash
66	Curse

This standard seems to be how Nintendo prevents wild Pokémon from having HS moves - if you encountered a Level 10 Polteageist, it would know the moves Astonish, Withdraw, Aromatic Mist, and Mega Drain. However, they've changed the way it works in Gen 8. It now looks as follows:

1*	Teatime
1*	Strength Sap
1 	Astonish
1 	Withdraw
1 	Aromatic Mist
1 	Mega Drain
Evo	Teatime
18 	Protect
24 	Sucker Punch
30 	Aromatherapy
36 	Giga Drain
42 	Nasty Plot
48 	Shadow Ball
54 	Memento
60 	Shell Smash
66	Curse

Note that in practical terms not much has changed - however now rather than have any duplicates, the duplicates of Aromatic Mist and Mega Drain at L6 and L12 have simply been removed (likely as a space saving feature).

As another note, quite a few of the older movepools have often simply marked Heart Scale moves as 'HS' - some of which actually creating movepools that are impossible, as their HS moves lack appropriate numbers of L1 moves. These should all simply be marked as L1 - HS doesn't require a special indicator, just be a L1 move that has four other L1 moves after it.

This should help inform how Gen 8 Heart Scale and Level 1 movepools now work - expect a lot of more 'sudden' jumps in the early levels. For those working on CAP27 movepools, I suggest making sure you consider the impact this will have on the LC edition of your movepool!