You've gone back in time, whether it's time travel, reincarnated as yourself as a kid, whatever. You do the usual 'hindsight is 20/20' shit, get big stonks, stop 9/11, maybe save some people, whatever.
But because you're a giant loser virgin you drag your arse back over to this franchise. Game Freak knows you're from the future and has asked for assistance in design and your knowledge of what worked and what didn't to help steer them for the future. What would you change about the series? Would you leave it the same up to a certain point? Rewrite history from day one?