>>41387795im going to try not be edgy for a second and talk about these Parisians. first of all, like everthing in kalos they need a bit more bite to them. They need to be a threat to the player. Give them full teams of six by the final fights and give them full or at least threatening movesets. All of them should change their outfits by the end of the story as well and become more fashionabluh.
Now for the individuals. tierno: having a dancing themed trainer is an awesome idea *and* this guy has an awesome design. A big doofy looking guy can be endearing or intimidating but his look doesn't really match the dancer thing he's got going on. Give him a different outfit as the story progresses. second of all he should have one of the two kanto starters the player doesn't have. Every battle with tierno should be a double battle, just for something unique and we need to use a time machine to put oricorio in the game one generation early just for him. other than that make him appear regularly outside his friend group.
Trevor shouldn't be a challenge in battle but he should be annoying. Trevor's team should be a team designed around finding and catching pokemon. False swipe, sleep moves on every pokemon, soak. not ideal for fighting the player but it serves as a cool back ground detail. Next his team should be completely different every time you face him. he is trying to get a full dex after all. Finally every time you meet trevor either sycamore, dexio or sina should be there to check how many pokemon the two of have caught and give who ever has caught more a solid reward; be it money, a rare tm or a mega stone. If you want to beat trevor at this you have actively try to catch pokemon.
shauna, she exists as frame work for lily. if she's romance-able actually make her romance-able. if not, don't. if are going to make her more of a reliable, then you need to make the other rivals mean for contrast. also give her gothitelle.