Final Fantasy 4 Codes -

Completion bonus:
Successfully complete the game and save it. You can start a new session with a cleared saved game file with your previously obtained augments and other items. Note: This can be done only a total of three times on the same cleared saved game file.

Whyt's (Poochika's) body skins:
Complete the indicated task to unlock the corresponding body skin for Whyt (Poochika).

Dragoon: Score 9,999 points in Kain's 100 Meter Jump mini-game. 
Goblin: Complete the main story two times. 
Ninja: Score 9,999 points in Edge's 100 Shurikens Throw mini-game. 
Paladin: Score 9,999 points in Cecil's 100 Goblins Punishment mini-game. 
Summoner/Black Mage: Score 9,999 points in Rydia's 100 Math Homeworks mini-game. 
White Mage: Score 9,999 points in Rosa's 100 Second Meditation mini-game. 
Zeromus: Have a 100% Bestiary completion.