Here is the full list of all 43 Romancing SaGa 2 trophies - there are 32 bronze, 7 silver, 3 gold and 1 platinum.
Defeated Sinful Memory
Defeated Ruined Memory
Won Against Victor
Defeated Evil Memory
Defeated Crushing Memory
Befriended a Diviner
Befriended a Ninja
Befriended an Iris
Nurtured the Avalon Tree to the fullest
Defeated Wagnas
Befriended a Levante Guard
Befriended a Diver
Defeated Subier
Became the Final Emperor
Befriended a Nomad
Defeated Bokhohn
Befriended a Desert Guard
Defeated Noel
Befriended an Imperial Guard
Befriended a Salamander
Befriended a Mole
Defeated Rocbouquet
Befriended an Amazon
Coppelia became Emperor
Defeated Dantarg
Befriended a Nereid
Befriended a Hunter
Befriended a Strategist
Befriended Coppelia
Befriended a Crusader
Befriended an Armed Merchant
Befriended a Mage for Hire
Befriended a Saigo Clansman
Befriended a Vagabond
Befriended a Brawler
Defeated Kzinssie
Gerard became Emperor
Defeated the Watchmen
Acquired all trophies
Acquired Dark Magic
Finished the Game
Finished Game without Final Emperor
Defeated Dread Queen