Realm of Memories

The Realm of Memories is a stage in in which players can play through different areas from,  and. They are located in the Hero (middle), Golden (left) and Silver (right) Doors respectively. Each door has three different levels, and unlike the main game, they are not randomized. Each one is longer and harder than the four main stages of the game, but they do not have bosses. The visuals of the game will change to suit each stage, with a monochrome scheme for the Game Boy levels, and 8-bit colors on the NES levels.

Ironically, all of the games referenced in the Realm of Memories take place after Four Swords in-universe.

Levels
Levels:
 * Hyrule Castle
 * Hyrule Castle Dungeon
 * Lost Woods

Levels:
 * Mysterious Woods/Goponga Swamp/Koholint Prairie
 * Tail Cave
 * Tal Tal Heights/Tal Tal Mountain Range/Mount Tamaranch

The Legend of Zelda Levels:
 * Overworld
 * Overworld/Lost Woods/Graveyard
 * Level-1

Rewards
After completing each of the three Doors, Link will unlock the Master Sword on the Save File and will be able to fire Sword Beams while at full health on any stage.