Quoted By:
ITT: We develop headcanon in which the main protagonist from each main series game is actually the same person.
Order is:
FRLG -> Emerald -> Platinum -> HGSS -> BW -> BW2
I'll start.
After becoming the Champion of Kanto, you move to the Hoenn region, where your father (Norman) has been working as a Gym Leader. He had to start his new job as a leader as soon as possible and moved a few months ahead of you and your mom, which explains why he wasn't around in Kanto.
Due to a recent problem with Pokemon transfers (ala Celio on One Island), you had to wait until you received the National Dex to transfer your old partners to Hoenn.
Your turn.