Bonga Bugle Goldsun - Secret Treasure
If you use a Knockback ability on the Head Editor and move Luso to where he was standing, the treasure detector will go off to reveal a special item with a little message how it is the "Special Bonga Treasure."
Unlockable Clan abilities
During the prologue (Luso's summer journal), you can answer the three questions in the following orders to unlock different clan abilities from the beginning.
AP Up 1 - Answer B, C, C
Clan Up 1 - Answer B, B, C
Evade Up 1 - Answer B, A, A
EXP Up 1 - Answer B, C, B
Gil Up 1 - Answer B, A, C
Lucky 1 - Answer B, A, B
Power Up 1 - Answer B, B, B
Smash Up 1 - Answer B, B, A
Speed Up 1 - Answer B, C, A
Arcanist - Complete The Nu Mou Nobles quest
Assassin class - Complete quest,Veis Assassin
Beastmaster - Complete the quest Knowing the Beast
Cannoneer - Complete Quest: The Bangaa Brotherhood
Dragoon - Complete Kyrra, Dragoon
Fighter - Complete "To be a Fighter"
Green Mage - Complete Green Dominion Quest
Red Mage - Complete/Defeat Red King of Cinquleur