Doctor has something to do with Lin. We first learn about that at Tanzan mountain meteor base. Also, there’s a dialogue between Charlotte or Saphira(don’t remember) and doc. I believe doc says something about that he’s not interested in the children that ran away from the orphanage and there is something else that He is interested in. The last thing I’d like to point out is that we meet the doctor at the world after Gardevoir creates a black hole. He is searching for Lizzy and repeats this name few Times. I believe that Lizzy is the young Lin and you better watch out for the doc. I don’t believe He will ever be on our side, but I’m pretty sure he will somehow help us by trying to find Lizzy aka the young Lin.
Second theory I have doesnt have a backbone at all but I have a feeling Ame isn’t dead. I mean, how could Lin defeat a champion so easily yet lose to a Saphira? Lin also uses “Ame’s” alolan ninetales in titanias gym, which isn’t even lvl100. Why wouldn’t it be lvl 100? I believe we will encounter Ame again and will need to rescue her. She couldn’t have died so easily..
Hopefully you can understand something from the brainfart I just wrote lmao