I might bring over a Chimchar and pretend that he was my starter I've never used one before and besides I'm not sure I like the Unova starters.
Continue and just use whomever I feel like at the time when I catch them.
And then I'm going to solo the E4 with a Lucario.
After that I'll trade them back to my White game and start fresh with a new team:
and the other one is undecided.