Well, here is the first idea and if you do it, I wouldn't mind summarizing the others as well.
First of all the story is not chronologically placed anywhere in the canon series.
Since Ash and Misty find themselves in Kanto without further ado, here Misty gets or finds some berries by mistake that will make her grow the more she eats them, and upon seeing their effects she decides to take Ash with her Special charms, since she doesn't have other clothes or underwear or swimsuits left, Misty orders a bikini online that adapts to her constant growth, being a two-piece blue one. Dark and light blue details, Misty was delighted with her new bikini as they held up her enormous and improved tits very well, which without knowing it, along with the rest of her body, will be massively Titanicas
Details: misty At first she is very very tall, growing up to an Amazon, then she will officially become a Giantess when she grows to the height of 15,25,30,40,50,60,70,80,100 and 150 feet
Misty, in addition to liking to get bigger, stronger and sexier, is very dominant and, above all, possessive of Ash.
If there are vore scenes, misty The first one she eats will be Damian, who starts bothering Ash and when she gets sick she grabs Damian and swallows him alive, also in a wild scene where misty After measuring 70 to 80 feet, she goes to swim in the ocean and when she sees a cruise ship she cannot resist her impulses as a cruel and mischievous Giantess, so she plays with the ship and the people, and after devouring everyone Sinking the ship, Misty was grateful that Ash didn't see her, as she didn't want her lover to see her as a giant people-eating sea monster.
The other thing would be that Misty would be very sensual and perverted with her little lover that when Misty already measures 15 to 25 feet Ash and all the others from her perspective are doll sizes for her and her I'm huge and getting bigger, I hope you don't turn it into a gigabyte, since I don't like them too big