-( Story related, cannot be missed )-
This can be obtained as early as having restored Kamiki Village along with the villagers, but you will need to do it later when searching for the Canine Warriors. Mushi, the only little kid in the village, has a pet dog, and together they hold the record for digging up Mushi's mothers turnips. Your job is to beat that record.
Start by digging up one. Mama Mushi will start to get mad and come at you threatening to thwap you. Either jump out of the way or use a Power Slash (Tachigami) to daze her. Furthermore, if you outrun her and stay on the field, after a few failed attempts she will return back to her spot until you continue to dig. This can be rather frantic, so just take some care with preparation. If you leave the field before you receive the prized Oddly-Shaped Turnip, you will reset the mini-game and have to try all over again.