Pokemon Snakewood Jouney

Haunt wakes up in Littleroot Town, which is completely destroyed. She has lost all memory due to a building collapsing on top of her. She manages to get out and find the Professor of Johto, Professor Birch, and he sends her on a very important mission. Since recently, the entire region of Johto has been plagued with zombies and demons and Haunt must go through the region in order to find her brother, Landon, and Professor Birch's daughter, May. What twist of events will Haunt experience? Will she find out the cause of the zombie outbreak?