Power Berry #1: 0:00 Tilled on your farm.
Power Berry #2: 0:09 Tilled on your farm. (Won't appear the same day as the first).
Power Berry #3: 0:18 Smash the Chicken Statue. This can be done on your first day- just break it with any Hammer.
Power Berry #4: 0:29 Catch a fish, then throw it in the bottom of the Pond.
Power Berry #5: 0:57 Break a stump on the Mountain.
Power Berry #6: 1:12 On Fall 12, bring a fish or Full Moon Fruit to the festival. (Fruit found on Mountain Summit).
Power Berry #7: 2:10 On Fall 20, attend & win the Egg Festival. (Gives Power Berry one year, and Turtle Shell the next. Reset & win again to get the Berry sooner).
Power Berry #8: 3:20 On a random night in Winter, you'll hear a noise. Go outside & the Carpenter tells you to go to the Mountain.
Go there, and the rock just above the start will be gone. Break the stump just next to the pond there & drop down.
Power Berry #9: 4:30 On any day of Fall, go to the Animal Shop & sell a chicken. Bring it out of the coop & into the Animal Shipping section. The Hawker will then come & trade you a berry for it. (You lose your chicken).
Power Berry #10: 5:55 On Spring 23 of year 1 or 2, buy the Snow Flower Seed from the Peddler for 2,000g. Plant it on the first day of Winter, (At the small dirt mound on the Mountain Summit), and the Fairy will give you a Power Berry.