Dark Cloud 2

Story related and cannot be missed. You will unlock this trophy when Max announces the beginning of Chapter 6.

This fight is split into 2 different phases. The first fight is Max, all alone, against Gaspard. This fight works pretty much the same as the Monica segment in Chapter 3, just with Max. You can use your gun if he's too far away, and use your wrench/hammer when he's too close.

After the first phase, Gaspard will transform into a giant fire demon. You will want to switch to the Ridepod here. Use whatever weapon you're most comfortable with and go at it. Once his health has fallen to 0, you will have won.