BackSet
The Great Thief Yatagarasu!
So... I was thinking that our characters could run into the Spiritomb you cna find in the game but it's much creepier than in the game. It's sort of amorphous and super deadly and can cover the entire room in dakrness and eyes and mouths, sort of like a purple version of Pride from Fullmetal Alchemist: Brotherhood. But I'm not sure if it's too early to set us up against something so eldritch. Then again, the Electric Tale of Pikachu Manga had Ash going up against a giant Eldritch Haunter pretty early on. And I figured after our characters got out of that Team Aqua and Magma would show up and we'd have to either keep the drive away from them or buy time while it downloads and then erases the files. And when we do that our characters all get to show off how super cool they are.