OK, this is the answer. Once it says you can use a password, do NOT enter it. you must beat Kenshin or Shingen ( I prefer Shingen over Kenshin, because 2 reasons. 1. You've beat Motochika, hopefully you have someone from Fontaine. 2. There are less banners,and there are no portals so it's less confusing)and before you beat them, your player evolves, so it's easier to beat (one of) them. Then when you recruit them,(You only need to beat one to have the other)Keiji gives you a fire,water,and thunderstone.Equip one of them to Eevee, and after a battle, he evolves! To get the others, look it up because I don't know how to evolve them because I chose Flareon. THEN you use a password and they appear in one of your kingdoms. Reshiriam's special event password (only used in Hideyoshi's story after you finish the game) is 2rz3XFEKxR.