From Bulbapedia, the community-driven Pokémon encyclopedia.
Lisa (Japanese: リン Rin) is a Pokémon trainer who debuted in Spell of the Unown, the third movie. Her Japanese voice actress is Ai Katō and her English voice actress is Lisa Ortiz.
In the anime
Lisa was a major supporting character in the third movie. She met up with Ash and his friends and challenged him to a battle. Despite defeating two of his Pokémon, Ash defeated her in battle.
Later on in the movie, when Entei was crystallizing the town, Lisa gave Ash her PokéGear so he could keep in contact with Professor Oak. Lisa hasn't been seen since the third movie.
The following is a list of Pokémon that Lisa is known to possess.