After you get your 2nd Starter PKMN, Go to Mr. Pokemon's House and he will give you a Red/Blue orb for a Special Surprise.=)
After you get the Special Surprise you must get the other Surprise from the Opposite game that you have Heartgold/Soulsilver, then When you have both of them that came from the Embedded Tower, go back to Oak's lab to hear a Story then you get another ORB called the JADE ORB(AKA: The Green ORB) to get the last Thing that you Really want.
So that is your awnser for what you want to know.