Some of her Pokemon might be concerned. For example, a Chansey, which is known for being nurturing, could try to encourage her to eat healthier. It might bring her berries instead of the fatty treats she usually eats.
Well, it could be about a Pokemon girl who has a change in her lifestyle. Maybe she starts to eat more of the delicious Pokemon - themed treats like Poke - puffs. As she consumes more, she gradually gains weight. For example, she might be so into the new Miltank milk - based desserts that she can't resist and starts to put on pounds.
Meowth would probably be overjoyed. He has been with Jessie and James for a long time and would see their marriage as a great thing. He might be more helpful than ever, running errands for them and even trying to cook for them using his little paws. Their other Pokemon like Ekans and Koffing might be a bit confused at first but would soon get used to the new situation and be protective of their new 'family'.
Ash's Pokemon would likely have mixed reactions. Some like Bulbasaur, being the gentle and observant one, would be quick to accept Sabrina. It might even enjoy the new psychic powers that Sabrina could bring into their group. However, Squirtle might be a bit mischievous at first, trying to test Sabrina's patience. For Sabrina's Pokemon, Alakazam, being highly intelligent, would sense Ash's good intentions towards Sabrina and would support the relationship. Her other Pokemon would follow Alakazam's lead.
One common theme is the change in the Pokemon's lifestyle. For example, if a Pokemon starts living in a place with abundant food, it may gain weight. Another theme is how the trainer reacts to the Pokemon's weight gain, whether they are concerned or accepting.
Another theme is the change in their abilities. Sometimes, the weight gain can either enhance or hinder their pokemon powers, which is often explored in these fanfics. For example, a heavier pokemon might be slower but have more physical strength in a fight. Also, friendship is a big theme. Their friends' reactions to the weight gain, whether it's supportive or not, play a major role in the story. In some fanfics, friends help the pokemon to lose weight if it's causing problems, or they accept the pokemon just as it is.
Pikachu might be very confused at first. When it sees 'Ash' (really May in Ash's body) acting differently, it could be hesitant to follow commands as usual. For May's Pokemon, they might be surprised to see 'May' (Ash in May's body) suddenly having a more battle - oriented attitude. For example, May's Beautifly might be confused when 'May' wants to train it for battles instead of focusing on its appearance for Contests.
His Pikachu would probably be very supportive. It would stay by his side as he studies, maybe even help him in small ways like fetching medical tools. It trusts Ash completely and would be happy to see him pursue something new.
Water - type Pokemon like Squirtle could be in a difficult situation. If there are any holes or puddles in the scary house, they might be scared of getting trapped. Squirtle would probably stay close to its trainer, if there is one, and keep its shell towards any potential danger. It might also use its Water Gun as a warning shot if it feels really threatened by something in the house.
She can start by adjusting her diet. Cut down on sugary drinks and processed foods, and increase the intake of fruits, vegetables, and lean proteins. Also, regular exercise is crucial. Even just 30 minutes of walking most days of the week can make a difference.
Some fanfictions may focus on the comical side of the weight gain. They could have humorous situations where May's increased weight leads to funny mishaps, like getting stuck in narrow passages or having trouble with her usual physical activities in the Pokemon world. It's all about exploring different aspects of this unique concept within the Pokemon universe.