Four Swords items

For The Legend of Zelda: A Link to the Past & Four Swords on the Game Boy Advance (GBA).

A Four Swords player carries one item at a time. To trade it, the player stands in front of another item and presses A, as the Chambers of Insight teach. The names, the messages, and the advice on these pages are the game's own, and the Player's Guide (page 107) adds a line on each.

Shield
Bombs
Bow and Arrow
Boomerang
Pegasus Shoes
Magnetic Glove
Gnat Hat
Roc's Cape
BowWow
Rupee Shard

Seeds

The seeds are not items a player carries. The Chambers of Insight say this about them:

The mystical seeds you see will increase your power by two levels. Razor Seeds increase sword power. Armor Seeds increase defense. Pegasus Seeds increase speed.