Also, I don't remember Misty being that cheery. I guess she mellowed out after becoming Togepi's adoptive mom, huh?
Nope, Misty has always been that cheery. Exploring on various facets and attractive sides to Misty's personality (passion for water pokemon, competitive spirit, romantic and girly nature, sassy and cynical attitude, hotheaded and temperamental side, insecurity and timidity when she found herself in scary places or when love is in question starting to panic, intelligence and great deductive skills observing details often exposing TR behind masks etc). Becoming more mature and responsible as person. Made amends with her tragic past of growing without parents and suffering from neglect and degradation from older sisters overcoming complex of inferiority, Grew in more warm and compassionate person valuing greatly Ash and Brock to the point of crying when having to leave them at end of Johto.
Followed with overcoming childhood trauma from Gyarados and developing pride, tough side to her and independence becoming stronger and more resourceful character as Hoenn cameos showed leaving May and Max amazed. By her badass side in utilizing Gyarados or Azurill. Her sarcastic and teasing remarks toward Ash and Brock, adventurous and playful nature knowing how to take care of problems on her own and hotheaded, feisty side not letting anyone to mess up with her. Followed with nurture, care and protectiveness in taking care of Max when lost, her Togetic and supporting Ash absolutely on his future quests as revealed when watching on TV his Hoenn league performance.