If you’re a fan of the Metroid series, you might be intrigued to know that linking Metroid Zero Mission to Metroid Fusion can unlock a hidden treasure: the Metroid Fusion picture gallery in Zero Mission. This unique feature not only enhances your gaming experience but also serves as a nostalgic nod to the interconnectedness of the Metroid universe. To access this gallery, simply connect your Game Boy Advance with a link cable and hold down START + SELECT while booting up Fusion.