White: Piplup Line
Gray/Grey: Snivy Line
Black: Squirtle Line
Red: Litten Line
Orange: Charmander Line
Yellow: Torchic Line
Green: Rowlet Line
Blue: Sobble Line
Indigo: Chikorita Line
Purple/Violet: Sprigatito Line
Brown: Scorbunny Line
Pink: Mudkip Line
Additions:
Olo (Suggested by @ShortSnivyy ): Quaxly Line