Powerberry Locations

From Harvest Moon - Wiki on Neoseeker

It would be a good idea to collect all of the Powerberries. They increase your overall stamina. This means you'll be able to accomplish more things throughout the day.

• Powerberries 1-6 ~ Tilling the soil on your farm. There's no set location on where the berries will be; it's completely random.
• Powerberry 7 ~ From the mermaid after you meet her.
• Powerberry 8 ~ Failing the snowboarding game. You must get the rank of D or S.
• Powerberry 9 ~ Fill up the town's aquarium with every fish.
• Final Powerberry ~ Keeping the harvest sprite's secret after the earthquake hits.