While the resurgence of Poke Girls as travel companions is unlikely, "Pokémon Journeys" did show a glimpse of Ash and Serena's encounter. It was a treat to behold, even if it was very brief. I believe that the writers did an excellent job showing her relationship with Ash and their unspoken bond. They didn't make it awkward and dramatic; they kept it short and sweet, which is best for Pokémon. I hope that Serena returns for the Pokémon series, but, I'll be honest, it's unlikely that she'd ever travel with Ash again since her character has undergone extraordinary growth. I don't know what the next steps for her will be, but I'm aching to find out and eagerly waiting to know what she does next.