Anna

Dr. Anna is a character of the day who appeared in Hassle In The Castle (EP167). She also appeared in Ash & Pikachu.

Dr. Anna runs a clinic, along with her assistant Keiko. Here, people with injuries are treated through the help of Pokémon. Among the many Pokémon at the clinic is her Zubat, named "Mimi", which she uses to X-ray her patients to find out what is wrong with them.

One day, Ash and his friends came along. Impressed with Mimi, Brock sent out his own Zubat. He asked Dr. Anna if she would be interested in letting him help out at the clinic, and she agreed.

After Team Rocket attacked, Brock sent out Zubat to stop them. During the battle, his Zubat evolved into Golbat. After it used Supersonic, Dr. Anna's machine—which she used to scan patients—broke. After Team Rocket was sent blasting off, Dr. Anna told Brock that she couldn't have him helping her out, since Golbat's Supersonic was far too powerful. Heartbroken once again, Brock continued on with Ash and Misty.

(Source: Bulbapedia)