Warning: Potentially Trivial Question
In XY, when you meet Professor Sycamore in Couriway Town, he says "by stopping Team Flare, you also saved Lysandre". I think we've accepted that there are 2 possible conclusions of what actually happened to Lysandre. Either he obtained immortality which somehow also allowed him to survive the big explosions or much more likely, he died.
So what does Sycamore mean when he says that you saved Lysandre? Is this really meta and saying we saved him from what he would have become? Would Pokémon ever get that deep?