DRAGON QUEST XI: Echoes of an Elusive Age

The Album de Medailles is a key item obtained from speaking to either the lady standing next to the Slime in the Casino Hotel of Puerto Valor or from the headmaster at L'Académie de Notre Maître des Médailles. Once obtained you can exchange any Mini Medals you own for stamps to fill in pages of your album and unlock rewards at set milestones. In order to unlock more pages after the first you will need to see the headmaster at L'Académie de Notre Maître des Médailles as only he will continue to exchange medals from that point on. To unlock this trophy you need to fill in three out of the four pages available in this album which requires 75 Mini Medals.

Mini Medals are found practically everywhere. In chests, in smashable pots and barrels in towns and are even awarded from completing quests. There are more than enough to unlock this trophy without grinding simply by thoroughly exploring all areas in the game but there are of course options to farm them if necessary. You can steal them from the Umbra and Vicious Penny Pincher monsters located in The Disciple's Trial - Cruel Crypts which will require you to be in Act 3 (Post Game) and have access to the trials in the Zwaarsdrust underground ruins. They are also awarded as a consolation prize from the Gallopolis Black Cup horse race. The Black Cup is unlocked through successfully completing a trial in the Zwaarsdrust underground ruins and selecting "I wish I could enter a top-level horse race!".