Unfortunately, it seems impossible for me to rip the rest of the sprites.
Gamefreak really did a good job in hiding data. Someone's been trying to hex edit the game but he has no luck in finding them either. Others are also trying to extract the sprites for trainers, items, Pokemon in other means possible. So, I suggest we wait.
Welcome to the ghost type lovers group IcyKerpymon. Btw were holding a D/P/P tournament with a legit shiny Darkrai as first prize. You can read the rules and post your FC in the tournament thread of the group.