Chinatsu

Kylie (Chinatsu) is one of the characters of the day in "A Full Course Tag Battle!"

She appeared along with her fiancé, Roman, who owns the Seven Stars Restaurant on the Valor Lakefront. Trainers must battle her and her fiancé in a Double Battle in order to eat in the restaurant for free. Kylie and Roman first battled with Ash and Brock and were both easily defeated. Then, they were to battle May and Dawn. But before they could start, Team Rocket broke into the restaurant and stole all of the food.
Kylie tried to use her Munchlax to help May's Munchlax locate the missing food, but it seemed to be thrown off easily.

After May and Dawn dealt with Team Rocket, Kylie and Roman started their battle with the two girls. Although putting up a good fight, they were defeated.

(Source: Bulbapedia, edited)