Yggdra Union Codes -

Completion bonuses:
Successfully complete the game to unlock the "Extra Contents" option, "Hyper Speed" option, and Hard difficulty setting. To change the speed, turn on the "Hyper Speed" option then press R for high battle speed. Press R again for hyper battle speed.

Quotes:
Successfully complete the game under the Hard difficulty setting.

Characters:
Complete the indicated task to unlock the corresponding character.

Cruz: Go to the small area near the exit of BF 23. Another exit will appear. Go there and enter BF 23.5 to find Cruz.
Mistel: Search both villages in BF 13 to go to BF 14 I/II and find Mistel.
Pamela: Under the Hard difficulty, go to BF 23 or BF 24 and put Nietzsche next to her.
Russell: Go to BF 20, move left, and save Flone from Aegina. Then, place anyone next to Russell in BF 21.
Nietzsche: Go to the map with the Undines. Go all the way down in one of the towns to find Nietzsche.