>Blastoise
Squirtle is probably the best choice for her as a starter.
>Nidoqueen
Uncommon route 2 'mon, helps her beat Brock and Misty (or Surge if she starts in Vermillion).
>Marowak
Picked up around the radio tower, knows Cubones have a "damaged" relationship with their mothers and sympathizes with it.
>Exeggutor
After those memories on Exeggutor island, she was happy to know that most Exeggutor aren't that large.
>Blissey
She catches a Chansey in the Safari Zone and keeps it to help her mom recover and round out her team with a tank.
>Sylveon
Bill gives her an Eevee. She is a very caring trainer and quickly evolves her Eevee into a Sylveon.