Each side quest you complete, The Avatar's experience (EXP) increases

The Pirate Friends
Talk to Mole and find out that he misses his friend Blacktooth; they had a falling out. Talk to Blacktooth and he will say he misses Mole too. Tell both of them the other's feelings and they will be friends again. Isn't that precious? Note: This one gives you 10 exp every time you complete it, with no limit to the amount of times you can do it.