The Legend of Zelda: Mystical Seed of Courage

The Legend of Zelda: Mystical Seed of Courage (sometimes referred to with the fanon title Oracle of Secrets), was originally designed to be a sequel to both Oracle of Seasons and Oracle of Ages. Mystical Seed of Courage was supposed to be released several months after its prequels arrived on the shelf to form the Triforce Trilogy with the other two games. It was canceled due to issues involving how the games connected to each other. The project was soon scrapped after complications arose with linking the three games together.

Official Story
The official story follows as Nintendo described it.

''Princess Zelda, responsible for managing the four seasons of the Land of Hyrule, and the Triforce of Power have been kidnapped by Ganon. The brave hero Link learns of this and sets out to save the princess. However, Ganon learns of Link's quest and splits the Triforce into eight pieces, scattering them throughout the land. In addition, the Rod of the Four Seasons (a device that controls the seasons) along with its hiding place in Hyrule Castle, have flown off to another dimension. As a result of this calamity, Hyrule's four seasons are thrown into chaos and the order of the seasons becomes jumbled. In order to save Princess Zelda and find the "Rod of the Four Seasons," our hero Link must travel back and forth between Hyrule and this other dimension, while receiving help from the spirits residing in the "Tree of Mystery" and also the strange "Uura Tribe" found in this other dimension. Two characters that will help Link on his quest are introduced. The first is a kangaroo named Ricky. When Link climbs into Ricky's pouch, he will be able to jump and using a pair of boxing gloves, be able to punch out enemies. The other character is Maple. She suddenly appears flying on a broomstick and crashes into Link, bringing about various events in the storyline. The new item, the Rod of the Four Seasons will be required to solve certain riddles that appear in the game. Maybe the winter snow covers a secret entrance to a dungeon, and you'll need to change the seasons to uncover it.''

Known facts

 * Mystical Seed of Courage was supposed to feature Farore, similar to Din's appearance in Oracle of Seasons, and Nayru's appearance in Oracle of Ages.
 * Mystical Seed of Courage kept the pre-release prefix of the Triforce Trilogy, and is was the only one out of the three titles to do so. The original title of Oracle of Seasons was Mystical Seed of Power, and the original title for Oracle of Ages was Mystical Seed of Wisdom.
 * This game was to feature time travel, and puzzles involving the time of day.
 * Oracle of Ages was originally going to feature puzzles involving colors. When The Mystical Seed of Courage was canceled, Oracle of Ages took the time travel theme.
 * No screenshots of this game exist.
 * The box was likely going to be green, with the game titled Oracle of (*). While one might assume that the title of the game would have been Oracle of Secrets, it is debated whether would have received the title "Oracle of Secrets" if she had been featured in her own game.
 * The game would have somehow involved the Book of Secrets.
 * If the game was to be released, this would be the only game in which the Triforce of Power is split, thereby making all three Triforce pieces splitable.