It's incredibly amazing that a team of people GameFreak dumped this task onto had very little to no knowledge on what Pokémon was and somehow managed to make one of the best experiences the series has to offer to date.
Friend showe me this and i pitched the idea: You're playing your game normally and Wes comes in from out of nowhere and battles you, stealing one pokemon before leaving. He does this 6 times throughout the story and at some point post E4, he has them at high level and their final evolution and he fights you with your stolen pokemon before giving them back