so idea for Silvally
so when the MC was going to his base in Alola for the first time on his way there, he saw a guy and a weird looking Pokémon, eating some ice cream. as he got closer, the guy kinda looked like an edge lord, in his opinion, but he was more interested by the Pokémon beside him the MC was not 100% sure that he was correct, but he believes that she was a legendary. As the MC approached the two of them, saw him approaching, The MC introduced himself, and he asked for the names of the two of them pacifically the pretty lady. They introduced themselves as gladion and silvally and then they asked what the MC wants. The MC starts telling them what his mission is. Then gladion says even though he agrees with what they're doing and it's the right thing to do. He refuses to give her up to the MC. It took him many years to get her out of that helmet and to make her feel comfortable, around him he's not gonna give her up or anything. Then the MC looked over to silvally and she agrees with him they truly got a good bond going, and she truly does care for him even though the life of pleasure does sound wonderful to her she doesn't want to leave him because he was the first person that truly treated her nicely. The MC knows that he's getting nowhere and he's not the type of guy to steal some guide girl unless the girl wants him first and makes the first move then he's fine with it also, he finds a relationship adorable.. Before the MC leaves gladion stop he there tells him about another one that he could go after. Explaining that the Aether Foundation made to silvally but after they were deem ineffective, they put them in cold, storage gladion was able to save one, but the other one he was not able to, but during in the foundation, the other one got out of its storage and got into the mainland. He's been tracking that one down to keep people away and try to keep her safe so he tells the MC where to find the area that she lives, after that the MC begins to leave and tells them thank you.
(Extra ideas ) The battle so the idea for this part is simple that she would be a type null but after the MC gets her pregnant, she evolved into a silvally like she finally accepted that someone truly cares about her. And lore reason is that the evolve with friendship. The idea for that downtime event as the MC was just chilling with silvally just watching the TV most likely the masked royal. But then he hears a knock at the door. The MC decides to get up and see who's knocking. It gladion with a bag of sauce, he gives the MC the bag and as he looked in, there's these weird disc. gladion Explains that these discs let's silvally change their type any thought the MC would like having them. After that, he probably makes a remark about the MC, fucking his sister and his mother. And then when the MC gets back inside, he sees that silvally is it a pretty sexy position and the MC decides well better than watching TV all afternoon.
And if you're wondering, yes, in the official game there are two silvally. And also to all the people that would be like why would he wouldn't just breed gladion silvally. The fact of the matter is that the MC would have to take her with him to continue breeding her to make her lay more eggs.