Do changes to the user's Attack stat affect Foul Play? If not, what caused the damage to increase?

Question

I Realize that this question has already been asked, however I have no idea how to explain what happened to me otherwise. I was playing through ultra moon whilst using an inkay/malimar (dont remeber which at the time of occurence) and my set at the time consisted of psywave/psychic pluck foul play and swagger. I used foul play on something and it only did about 25% damage, I got either growled or charmed at and because of contrary my attack increased by 1-2 stages. I foul played again and to my surprise it actually did a significant amount more damage then it did the previous turn (about 50% health was removed leaving it at approx a quarter). I know for a fact that there was no crit, and I seriously doubt that it was a min-max roll. if someone could investigate this WITHOUT SHOWDOWN I would much appreciate it (Yes, I'm asking for an in game test of ultra moon, this might be a glitch, was playing on ver-1.00 at the time. updated the game just yesterday).

Comments

You sure it was growl or charm, not some other stat changing move?

---

im positive that it was a stat changing move that would have otherwise decreased my attack but didnt due to contrairy

---

and it was definately a move that decreases attack, but wasnt baby doll eyes. something that you would encounter in a trainer battle before the lvl 40 range

---

How long ago was this? You don't remember the Pokemon that the individual was using or your approximate level range?

---

it was the same aproximate level, it happened within a week of when i posted this question. it was a resisted hit (iirc) and early 30's to mid 40's lvl range

---

I'm going to re-open this and change the title so it's clearer about what is being asked. The question above isn't the same as this one.

Answer 1

Long answer ahead:
No.

Explanation: Foul play uses your opponents attack stat.
Also damage dealt isn't exactly 100% set. There can usually be a range of damage, so dealing higher damage on another turn could just be a really high damage range.

Comments

i dont think damage ranges apply to that degree, it was practically double damage  and it only occured after i got an attack boost

---

Damage range can be actually 300%