From Bulbapedia, the community-driven Pokémon encyclopedia.
Delia Ketchum (Delilah is also seen; Japanese: ハナコ Hanako), also known as Mrs. Ketchum (Japanese: ママさん Mama-san) is Ash's mother in the Pokémon anime.
Delia Ketchum is a relatively reserved woman. Despite striking some as unintelligent, she was once a student of Professor Oak, along with Spencer Hale, possibly indicating intelligence normally unthought of her.
She lives in Pallet Town with Mimey, her Mr. Mime, which she obtained in It's Mr. Mime Time.
According to Takeshi Shudō's novelization, she runs Pallet Town's only restaurant, Pallet House, which she inherited from her mother. When she was younger, she dreamed of becoming both a model and a Pokémon trainer, but abandoned those dreams to run the restaurant after Ash was born. Brock once commented that she would make a great Pokémon trainer because of her perseverance.
She is usually a quiet, cheerful woman, but when angered, she makes it known, not caring who she is talking to, once telling Entei he should be ashamed of himself in Spell of the Unown.
This listing is of Delia's Pokémon in the Pokémon anime.
Her Japanese name means 花子 Hanako which translates to flower child.