You started out with your Vaporeon

She has been your best friend since the beginning but oddly enough you somehow got beyond Max Affection stat

However when you try to catch more pokemon she would incapacitate other pokemon instead to prevent you from catching them

One day as you were traveling she eats a weird fruit

Suddenly she turns into a beautiful girl

She seductively smiles

"Partner...I'm human now...That means we can marry!"

Her eyes glowed as water surrounded her