Early in the game Marshall can be found at the Picori Festival and he will tell Link that the mystic doorway opens only once every hundred years, and this doorway is what links the human world to that of the Picori.
Link is able to fuse Green Kinstones at various points in the game with Marshall. As it is a Green Kinstone fusion, it is not set to a specific treasure chest, but instead, one of the many possible treasure chests. There is one random Red Kinstone within the game that opens up a location in the Hyrule Castle Garden leading to a Piece of Heart, as well as a random Blue Kinstone that opens up a tree in North Hyrule Field leading to a Fairy Fountain. Marshall is one of the many characters in which Link can make these Kinstone fusions with.
- ↑ "Only once every hundred years does the mystic doorway open. This is the door that links the human world to the world of the Picori. When this door opens, the Picori can enter our world. And guess what! This marks the hundredth year since they last appeared here! I'm sure something wonderful is going to happen at this festival!" — Marshall, The Minish Cap.