I have played most Pokemon games, but I am deciding between Pokemon Sun/Moon/Ultra and Brilliant Diamond.
I have never played either of these games not even their original versions. What do you think?
Additionally, is Sun/Moon good or is the Ultra version better?
Don’t play Brilliant Diamond, play Platinum instead, it’s much better in every single way.
You can use an emulator to get it up and running quickly.
As far as Sun vs Ultra Sun, I think most people prefer the original but I’ve never played them.