Dark Cloud 2

To get to the Master Grade Core, you will need to have bought all of the previous cores first. The cores allow you to add more powerful bodies, arms, and legs to the Ridepod. The cores will cost you EXP (see Mechanical Upgrades if you need a reminder on how to get EXP). The first core will cost 900 EXP, then 1400 EXP, then 2000 EXP, then 3500 EXP, then 5000 EXP, and finally 6500 EXP, grand totaling to 19,300 EXP. Once you have bought the Master Grade Core, the trophy will unlock.