The 6th Leader is Serra right? Well, I believe after beating her, you needed to find the PokeMart where you can buy Medicine for Anna. The PokeMart should appear outside the entrance of the Railent to Chrysolia Forest/Tanzan Mountain. When you buy the medication, just go back to the house and you should know what else to do.
For speeding up the game, you can use Cheat Engine. It isn't recommended, but it is an option.