-Southern Route- Quest 6: Through the Cave
Caretaker - Head through the cave between 20 and 10s for safe travel, after which you will gain the Rubber Boots. Return through the cave and head to the cottage in the west to give the Rubber Boots to the old man, who will let you keep them.
Gourmand - You need to eat all the food available. The first village offers 2 kinds of food, Eel Stew for 150g between 30s and 20s or 10s and DEATH, and Loach Stew between 20s and 10s for 30g. Next you can grab a Loach Pie for 30g in the village that is (normally) at the other end of the cave. The last two meals are tricky, you need to enter the cave just as it turns from hard enemies to weak ones, or vice versa, so around 20s or 10s (20s obviously preferred), and you'll exit through a different tunnel that will land you on an island next to a village where you can purchase Ancient Meal for 200g and Ordinary Meal for 50 (eat the Ancient Meal, then run off and get hit, return and buy the Ordinary Meal). If you're having trouble getting the secret cave exit, clear out the easy enemies so you skip to the opposite end without running through the tunnel again. Keep pressing A around 20s and 10s (by killing the easy mobs only you make the 10s opening easier, but not the 20s, defeat all of the enemies in the cave and just keep pressing A for very quick results).