Whoever wrote the stories in PMD games (specifically Explorers of Time/Darkness/Sky) should also write the story for the Pokemon games.
At the very first time I saw Lysandre in XY, I was 100% sure that he was the antagonist. That’s no fun. I want a game where somewhere in the middle, the professor was actually the bad guy and all the information you and your rival’s pokedex gathered has greatly contributed in some earth shattering evil plot. Give it some more angst and the player loses his Pokemon. I mean for once, I want the player or his Pokemon to break. And the rival helps him up and maybe let him borrow two Pokemon to recollect his old team. That’d be a nice mini arc.
I’d like a strong rival; but not necessarily in the ‘crazy difficult to beat’ kinda way. I want a rival that would really help you throughout your journey besides just repeatedly challenging you. A rival who gives sound advice and supports you especially during the evil plot, and who takes losses maturely. I wouldn’t mind if it was like in Gen 1 where they became the Champion and you had to usurp them, because a rival like that is definitely deserving of the title and the respect that goes with it.
I want a rival that actually grew beside you, and even surpassed your maturity as a Pokemon trainer. Because that’s what a rival should be- a reason for you to get better.