>>358251591) You can trade/battle against people on your own console via multiple sign ins on the one game
2) Co-op will allow a sign in function for player 2 using users on the same console provided both have reached a certain point in the game. But by doing so you can only use 3 pokemon in your party each at once.
3) The construction building in Vermillion is finished
4) You get to travel to Johto after the elite 4 and it's just as fleshed out if not better than the main Kanto region
5)
Silver is waiting atop mt.silver waiting to be challenged having bested
Gold__ and having become the strongest trainer in the world
6) Serena, Lillie & the Looker all make Cameos