Get Ikonda
got to frostville and in the middle of the village there is a well go a little to the left and walk up the little set of stairs and go in the house go upto the bookcase and hit A
Ikonda will show up and ask for a password put in Light as the password and he will join
Passwords
Get the five secret monsters
Find the five secret monsters during the game and enter the following codes when asked
Demon Ikonda Password Dark
Demon Lucifroz Password Light
Demon Pandora Password Megami
Demon Chort Password Atlus
Demon Starhair Password Tensei