There are a total of 24 Trophies in White Knight Chronicles. Here is a guide to get all of them.
Platinum Trophy[]
Platinum Crown: Earn All WKC Trophies
Bronze Trophies[]
Item Dabbler: Earn 100 Different Items
Equipment Dabbler: Buy 50 different kinds of Weapons/Armor
Bronze Star: Learn a entire set of Skills
Bronze Horns: Kill 100 Monsters
Mercanary's Badge: S Rank 5 Quests
Toadstone: Bind 50 Items
Bronze Medal: Raise Guild Rank to 4
Bronze Coin Purse: Earn 100,000 Guilder
Silver Trophies[]
Item Collector: Collect 300 different items
Equipment Collector: Collect 200 different kinds of Armor/Weapons
Silver Horns: Slay 3000 Monsters
Professional's Badge: S Rank 20 Quests
Anura's Ruby: Bind 200 items
Silver Medal: Raise Guild Rank to 8
Silver Coin Purse: Earn 1,000,000 guilder
Gold Trophies[]
Item Maniac: Collect 600 different items
Equipment Maniac: Collect 500 Weapons/Armor
Gold Star: Learn 8 sets of skills
Gold Horns: Kill 10,000 Monsters
Perfectionist's Badge: S Rank 50 quests
Phibiannachi's Diamond: Bind 450 items
Gold Medal: Raise Guild Rank to 12
Gold Coin Purse: Earn 10,000,000 Guilder