I was wondering if there were many yuri Pokémon pairings (from the games) that had a decent amount of popularity, aside from the extremely popular ones like Moon/Lillie, Gloria/Marnie and Elesa/Skyla.
I don't really have an exact idea, It seems to me that, today, there are so many significant Yuri ships that it is quite difficult to know the most popular ones. I didn't even know Gloria/Marnie was so popular, for instance. On the flip side, I'm not as invested in the franchise, and especially in ships, as I was many years ago.
But as far as Yuri Ships is concerned, I have the impression that they have become a trend since the fourth generation. At least that's when I was most aware of them.
At the time, I remember Maylene and Candice as quite relevant and meaning ship in the gaming universe, and Dawn - Zoe/Cynthia as popular ships among the anime fans.
In Gen 5, there's a lot of hype around Eleza and Skyla, as well as a strong ship around them. However, I have the impression that, today, this ship has lost some traction. On the other hand, Sabrina x Erika, a gen 1 ship that I was initially unaware of, seems to have been favored by the passage of time and gained a lot of strength.
In Gen 6, Serena and Shauna seemed the most obvious and sincere to me, since that, in games, the friendly Kalos girl seems, regardless of gender, emotionally very attached to the protagonist.
In Gen 7, Moon/Lillie ship seems to me to have reached a proportion never seen before. I have the impression that it is/was the greatest Yuri Ship, although I don't quite understand why.
In Gen 8, I remember hearing about Nessa x Sonia, although that ship seemed to me so ill-fated given the fact that Sonia always seems to me emotionally very attached to Leon, although the opposite does not seem to be true. Now, it looks like Gloria/Marnie is a thing.
In Gen 9, I don't have the slightest idea. I don't know of any ships in this game. And personally, none of this generation aroused any Ship interest in me, whether yuri or not. But, if I were to risk one.... Tulip and Dendra?
OBS: Just stating facts, the greatest Yuri, Aoi, straight (Is it the correct word?) Pokémon ship is, and always will be, Oldrivalshipping.