At E3 2003, Nintendo showcased two Zelda games that would make use of the Game Boy Advance connectivity, Four Swords and Tetra’s Trackers. In December of the same year, it was announced that the two games would be sold together on a single disc, Four Swords +, along with a third game, Shadow Battle. Four Swords Adventures was released in Japan with Hyrule Adventure, Shadow Battle, and Navi’s Trackers as three individual games bundled together.
In Navi’s Tracker (formerly planned as Tetra’s Trackers) multiple players use a combination of the television screen and Game Boy Advances to search for members of Tetra’s pirate gang in an attempt to gain as many stamps as possible within a given time limit. Action takes place on a Game Boy Advance used by each player, while the television screen shows a basic map and Tetra narrating the action. Unlike most other Zelda games, players can enter their name and choose their gender; however, they play as one of the Links regardless. A single-player mode is also available, which allows players to either collect alone or compete against Tingle, the aspiring fairy found in other titles in the series such as Majora’s Mask and The Wind Waker.
It was later announced on June 7, 2004 that Hyrule Adventures and Navi’s Trackers would be sold as two separate titles in the United States, while the retail status of Shadow Battle was still unknown. This decision was later changed – Hyrule Adventure and Shadow Battle would be bundled, while Navi’s Trackers would not be released in the United States. [Info from Wikipedia]
In the beta version of “Four Swords Adventures” it appears that Nintendo had planned on using the Link sprite from “Legend of Zelda: A Link to the Past”, but later changed it to the new “Toon Link” character design, as seen in the GBA version of Four Swords. The sprite was less detailed in the early build and looked like it was from an SNES game, but the final version’s Link sprite was improved.