Bionicle Heroes

After completing the game and going back to find everything for 100% completion you should either have this achievement or be very close to having it if not…

You can grind out the Lego pieces on the blue stage, start up the boss get enough Lego’s to get gold hero once press B to move the golden hero on the floor.

After the cut scene go to the right of the map, stand between two rocks there you are out of sight of the boss rubber band the A button so the bionicle continually attacks.

I used this spot with the unlocked boss character from beating the game facing the raised area. Depending on when you do this you’ll of course get the # o9f Lego pieces but it will also help with the kill achievements too.

ALSO: Spending the pieces for upgrades etc. does not effect this achievement the game tracks how many pieces you actually have even if you've spent some.

The following video shows how to do this; I do not take credit for it.