Here's part 3:
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Selene:

Lana:

Mallow:

Mina:

Lillie:

Lusamine:

Gloria:

Marnie:

Nessa:

Bea:

Sonia:

Klara:

Ashley Ketchum:

Sally the Hex Maniac:

Angela the Punk Girl:

Sam the Pokemon Ranger:

Irida:

Jessie:
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There, I just chose girls I liked personally, but you guys can pick one girl I can add.

Only one though from Gen 1 up to Gen 8.

From both the anime and the games.

No Gen 9 because Gen 9 characters aren't in Pokemon Masters as far as I can tell.