Emily

Emily is a character of the day who appeared in Wherefore Art Thou, Pokémon?. Emily lives in Yambera on Mandarin Island South.

She had an ongoing rivalry with Ralph, as both of them always competed with each other to see who had the best Pokémon. Somehow, they always ended up getting the same Pokémon, until Emily obtained a Nidoran♀ which she named Maria, and Ralph obtained his own Nidoran♂, Tony. Although the two trainers couldn't stand each other, their Nidoran fell in love.

Misty thought that Ralph and Emily truly loved each other deep down, so she tried to get them together. However, she only drove a bigger rift between them. They only decided to stop hating each other when their Nidoran were kidnapped by Team Rocket. Emily and Ralph teamed up to stop Team Rocket and get their Pokémon back.

After saving their Nidoran and seeing how much they loved each other, Ralph and Emily decided to put aside their differences and let Tony and Maria see each other. The two Nidoran, happy with their owners' decisions, kissed and promptly evolved into Nidorino and Nidorina.

At the end of the episode, Emily and Ralph appeared to have developed a crush on each other as when Tracey and Misty suggested they build a house for their Nidoran, they shouted each other's name instead of their respective Nidoran.

(Source: Bulbapedia)