Green returned home from his adventure in Kanto. After a long and cruel year and a half, he finally did it. He became the champion! But what now? He had no friends, no family, other than his cousin who he hasn't seen in forever, and most importantly, he had no home. His house was burned down when he was just 5 years old. It was a miracle he survived.
Contemplating on what to do next, he heard a voice go through his head, Head to Victory Road. I'll wait for you there.
Taking this as a call to adventure, he flew back to Victory road and sure enough, someone was waiting for him. The man was in a hooded emerald-velvet cloak, so he couldn't see his face. The stranger held out his hand to Green, and Green took it.
The two were warped away, and ended up on a secluded island.
Removing his hood, the figure spoke. "My name is Emerald, one of the seven Pokemon Master-Elites. Your training begins tomorrow, so get some rest."
Master-Elites? The people only talked about in legends? Green could not believe it. He clenched his fists, he was ready for anything.