I think you meant “once they hit the teenage years” instead of “teenage age”.
Oh, are they all forgetting all of a sudden?
Hmm... I don’t think it’s right to put ‘a’ in front of ‘déjà vu’, either. What about just “Déjà vu?” ?
Long story short:
Cyberponies try to take over Equestria
Doctor goes on ship
Dies and starts to regenerate
Ship crumbles Doctor escapes in new body
Everyone starts forgetting( which is happening on this page)
Not really spoilers- This already happened
Spoilers for YOU but no one alse
*points gun at head