Agatha is a character who appeared in Pokémon Generations, who is a member of the Elite Four in the Kanto region.
The Elite Four gathered at a place as they heard that a challenger was coming to challenge them. Agatha commented that it has been a while since a trainer with eight badges came to challenge the Elite Four. After the challenger defeated Bruno, he faced Agatha next. The challenger's Rhydon was able to defeat Agatha's Arbok and Agatha asked the challenger if he was collecting Pokémon for the Pokédex of his "old coot", insulting the challenger. Agatha was amused by his answer and sent out her next Pokémon, Gengar, to battle him.