It is one of the mons I am most proud of indeed; I recklessly hunted torchic when they came out since it was my starter back in Ruby and didnt’t bother checking its moveset when I evolved it until I found out SE had become legacy on it 3 days later. So, I was very lucky to not only find a perfect one and having enough candy to evolve it in time, but also by not taking any care in which attacks it got and not TMing it into ordinaryland (were TMs already a thing back then?).
It is probably my rarest, although I hear some other select Pokemon have stolen its place as the rarest in the game. There’s a very rare glitched Bug Bite (?) Shedinja and I read some people were able to get shiny Detective Pikachu by triggering the encounter at just the right moment after its event ended. There’s also the fabled shiny party hat Pichu.
Still, can’t complain about my little Kentucky, he has a special place in my collection and PoGO history, and the fact some people here even remember him makes him all the more special