On the visual boy advance you have The legend of Zelda Oracle of Seasons and Ages but how do you link them?

To link "The Legend of Zelda: Oracle of Seasons" and "Oracle of Ages" on Visual Boy Advance, you need to have both games loaded in separate instances of the emulator. Start with one game and progress until you reach the point where you can use the linking feature, which usually involves visiting a specific location in the game. Then, on the second instance, select the option to link to the first game, usually by accessing the "Linked Game" option in the menu. This allows you to transfer items, secrets, and other features between the two games.