Power Berries (Harvest Moon: Back to Nature)

There a total of 11 Power Berries to collect, the eleventh being blue. The protagonist's stamina is increased by a tenth of the original with each power berry, meaning he can work longer without feeling fatigued and fainting.

Power Berries

 * Mining the floors in the Mine.
 * Press select behind the Winter Mine's entrance during Winter.
 * Mining the floors in the Winter Mine.
 * Won as a prize for winning the Swimming Festival the first time.
 * Buy one at the Dog or Horse Race Festival for 1001 medals.
 * Randomly reeled when fishing from the ocean.
 * Give five offerings of crops to the Harvest Goddess by throwing them in the waterfall.
 * After growing 90 flowers on the farm Anna comes by and requests to take some flowers. Agree, and let her take as many as she wants.
 * When attempting to cut the cedar tree in Mother Hill's flower field, spare the tree by selecting the option "no".
 * Buy one from the Television Shopping Network for 5000g on a Saturday.
 * During the afternoon, walk the protagonist right from the tree stump to the side of the lake and throw three cucumbers in. Kappa rises from the waters and requests the player to stop bothering him by giving him a Blue Power Berry.