Currently, the amount of Pokemon that run Foul Play in SV and SS 1v1 is 0, with only a select few low tier mons that run it in older generations, and most importantly the damage rolls are completely irrelevant against special attackers anyway, since it's not a considerable enough difference in damage to change the number of hits required to KO.
Meanwhile, a very very relevant move instead that really needs the 31 Attack IVs is Struggle.
in SV 1v1, A tier Pokemon Iron Valiant and Ninetales-Alola both run Encore Disable sets that force you to struggle.
Aromatisse does the same in SS 1v1, with Taunt+Disable Tapu Bulu also forcing struggle against stall mons, and both of these are the main sets of A- tier mons.
In ORAS 1v1, S tier Mega Gardevoir's strongest set is Trick Room Encore Disable.
On top of that, many matchups like stall vs stall, leech seed pokemon vs other grass-types or choiced pokemon vs stall pokemon end up as complete PP stalls where struggle rolls often decide the outcome of the game, and in ADV 1v1 where struggle deals significantly less recoil, the difference in damage is incredibly important.
I've seen first-hand many tournament matches where low struggle damage ended up leaving the opponent at 1% hp and losing, so please implement this change.
Meanwhile, a very very relevant move instead that really needs the 31 Attack IVs is Struggle.
in SV 1v1, A tier Pokemon Iron Valiant and Ninetales-Alola both run Encore Disable sets that force you to struggle.
Aromatisse does the same in SS 1v1, with Taunt+Disable Tapu Bulu also forcing struggle against stall mons, and both of these are the main sets of A- tier mons.
In ORAS 1v1, S tier Mega Gardevoir's strongest set is Trick Room Encore Disable.
On top of that, many matchups like stall vs stall, leech seed pokemon vs other grass-types or choiced pokemon vs stall pokemon end up as complete PP stalls where struggle rolls often decide the outcome of the game, and in ADV 1v1 where struggle deals significantly less recoil, the difference in damage is incredibly important.
I've seen first-hand many tournament matches where low struggle damage ended up leaving the opponent at 1% hp and losing, so please implement this change.