After your character spends 10 Sun Stones to raise Animal Island, you will have the option of befriending various animals. If you befriend monkeys, they will help you expand your farm by finding materials for building and upgrading your farm. They will even find Gold Lumber for you, so it is very useful to befriend them.
To befriend an animal, you need to bring it up to 3 Hearts, which for animals, is 201 FP. Here are the gifts monkeys like:
- +9 FP - Banana
- +8 FP - Grape, Peach
- +7 FP - Apple, Onion, Orange, Pineapple, Strawberry, Truffle
- +5 FP - Blueberry, Buckwheat, Buckwheat Flower, Gelatin, Mayonnaise, Monkey Food, Mushroom Cluster, Reaped Buckwheat, Silkie Egg, Yogurt
Lastly, here are the people whose FP you will raise by showing them a monkey:
Every time you show one of the above people a monkey, they will get +100 FP.