<r>Game was fun, though the endgame content was pretty bland (endgame content as in after Chapter 2 - Chapter 2 was a blast...mostly.) Ran through the entire game on hard mode and didn't even have trouble with a single boss (Okay, I had trouble with ONE boss. Said boss is most likely the supposed ha...

Every blue chest contains 1 PB.

That said, here's the few I still remember:
1 at Cliff Village
1 at Summit
1 at Muti Village
2 near Brainix #1

I don't remember seeing any while going through the second chapter though.