>>53044702Reminder that Pikachu didn't get that excited when he saw Dawn or Serena. In JN, Pikachu doesn't greet every girl the same way. He doesn't jump onto the shoulders of every girl he meets, so you can determine who his favorite girls are and what he likes in a girl.
>1. Misty>2. Cynthia>3. Iris>4. Dawn>5. SerenaIt's safe to say that Misty and Cynthia are Pikachu's favorite girls since he likes them so much that he kinda ignores Ash for a while. As to why Iris is above Dawn and Serena is because Pikachu jumped to Iris and rubbed her cheeks. Furthermore, Pikachu seemed more excited to see Piplup than Dawn in contrast to Pikachu completely ignoring Psyduck in favor of Misty. But Pikachu was happy to see Dawn. Serena's at the bottom since he was definitely happier to see Dawn.
More importantly, it seems that Pikachu values battlers over contest girls. Misty, Cynthia, and Iris are all talented battlers, and Pikachu personally greeted them. The contest girls? Pikachu remained on Ash's shoulder. It makes sense. If Pikachu wanted to pick a girl for Ash, then he'd go for the girl who shares Ash's interest. Look at the JN episode with Serena. Ash would rather battle Wallace in the middle of an empty street than watch a contest.