>>53340158Serena is deredere for Ash, which is why she's boring. There's basically nothing to resolve with her other than Ash suddenly reciprocating her feelings out of nowhere, even though he could have done that much earlier. Misty is tsundere for Ash, which means that she needs to get over her own shyness and admit her true feelings. It's just more interesting from a storytelling perspective even if Ash doesn't reciprocate to her either.