I have only played Link's Awakening and Oracle of Seasons. I have also watched a YouTube playthrough of Oracle of Ages.

In all three games there is a particular item that a character wants (in Link's awakening for example it is a stuffed toy), and when you give it to that character s/he will thank you with another item, and after that what you can do (for the most part it's optional) is find someone who wants that item, and that person will give you something for it - basically you just keep swapping items again and again until you get something good.

My question is, do all the Zelda games have this in them?