>>48198577Ho-Oh and Lugia are both very popular but I think Lugia has a slight edge. Lugia was the third most popular Johto Pokemon after Tyranitar and Umbreon whereas Ho-Oh was at 15. I was under the impression that Kyogre was more popular than Groudon, though Groudon may have become popular since 2014 when the primal forms were announced. Dialga was much more popular than Palkia, though Palkia's signature move Spacial Rend was preferred over Roar of Time since the latter is just a dragon-type hyper beam. The rest are mostly correct, though I think Xerneas was slightly more popular at the time because Fairy was the new type at the time. Though
I think Yveltal is more popular than Xerneas nowadays.