@luvstiger If at all possible, I would reccomend playing Platinum instead of Brilliant Diamond or Shining Pearl. It's overall better in basically every way. It's way more charming aesthetically and has additional features not present in BDSP unless you're playing it modded.

Otherwise I can't argue with your list here. FR/LG are great versions of Gen 1, HG/SS are possibly the best games in the series, ORAS is as good as emerald with better graphics (it's extremely charming), BW/BW2 are fine to play together, x/y is w/e, and the Ultra games are probably the best way to experience alola.

Hope you have fun! I'd love to watch you play some of these, ESPECIALLY fire red!