To get this special item use a knockback ability on the Head Editor and then move Luso to where he was standing. The treasure detector alarm will then go off telling you that you've found the 'Special Bonga Treasure'.

To unlock the following clan abilities from the start of the game answer the three questions in the following order during the prologue (Luso's summer journal).

Unlock Power Up 1:
Answer B, B, B.

Unlock Smash Up 1:
Answer B, B, A.

Unlock Speed Up 1:
Answer B, C, A.

Unlock Evade Up 1:
Answer B, A, A.

Unlock AP Up 1:
Answer B, C, C.

Unlock Clan Up 1:
Answer B, B, C.

Unlock EXP Up 1:
Answer B, C, B.

Unlock Gil Up 1:
Answer B, A, C.

Unlock Lucky Up 1:
Answer B, A, B.

If you insert a copy of 'Final Fantasy: Tactics Advance' in slot-2 (GBA) of your DS and start a new game you will begin with the clan ability 'Libra' which reveals ALL traps and colour codes them.

Just complete the following quests to unlock the corresponding class.

Beastmaster:
Complete 'Knowing the Beast' quest.

Dragoon:
Complete 'Kyrra, Dragoon' quest.

Fighter:
Complete 'To be a Fighter' quest.

Assassin:
Complete 'Veis Assassin' quest.

Flintlock:
Complete 'Of Kupos and Cannons' quest.

Raptor:
Complete 'Instrument of Inspiration' quest.

Ravager:
Complete 'Ravager' quest.

Geomancer:
Complete 'Geomancer's Way - Sun' quest.

Lanista:
Complete 'A Lanista's Pride' quest.

Master Monk:
Complete Banbanga! Quest.

Arcanist:
Complete 'The Nu Mou Nobles' quest.

Heritor:
Complete 'Gifted' quest.

Green Mage:
Complete 'Green Dominion' quest.

Chocobo Knight:
Complete 'The Popocho's Chocobos' quest.

Spellblade:
Complete 'To Be a Spellblade' quest.

Trickster:
Complete 'The Sleight of Hand' quest.

Fusiler:
Complete 'The Goug Consortium' quest.

Cannoneer:
Complete 'The Bangaa Brotherhood' quest.

Seer:
Complete 'The Cat's Meow' quest.

Parivir:
Complete 'The Eastwatch' quest.

Viking:
Complete 'The Lord Grayrl!' quest.

Scholar:
Complete 'The Treasured Tomes' quest.