Rita (Japanese: レイコ　Reiko) is a character of the day who appeared in the episode The Lotad Lowdown. She is the eldest sister of Nicole  and Natalie. She is usually in charge of fixing the waterworks of the garden of the Flower shop. Her Japanese voice actress is Tomoe Hanba and her English voice actress is Amy Birnbaum.    As Rita entered the shop, she was quite surprised by Ash and his friends visiting them. Rita told her sisters that there was a problem with one of the watering pipes of the garden. After the group finished touring around the garden, Rita told Nicole that she needed to replace the broken watering pipe. While the pipe was being replaced, the Lotad come in to help in watering the garden.     Bulbapedia

After participating in the Johto League, Ash decides to begin anew in yet another journey; this time by himself and Pikachu, in the land of Hoenn. Though he isn't alone for long, as 10-year-old May (whom dislikes Pokemon, but just wants to come along to see the world) travels with him after Pikachu destroys her bicycle. Ash also meets up with his old companion, Brock, and May's younger brother, Max. Together, they travel along in Hoenn, battling Gym Leaders, entering Contests, and other events on the way to the Hoenn League. <br><br>
(Source: Anime News Network)