Something we've often craved is more references to the past, and recently we've had two of them- first we have the callback to Pikachu's refusal to evolve, and we've just seen Ash recall capturing his second pokemon, Caterpie, long thought forgotten. We went through Kanto a whole second time with no such callbacks, and now two occur within a few months? Do you think the writers are putting in more past references for a reason?