Spoiler alert! But if you manage to photograph a set amount of Lucky Emblems, you will unlock the enigmatic Secret Ending. As with anything involved with Kingdom Hearts, the ending is very cryptic. Some say it was just Tetsuya Nomura taking advantage of assets from the late Final Fantasy Versus XIII; others say it's him throwing breadcrumbs to justify any potential future lore. Honestly, I have no idea. But we do see Sora and Riku transported to contemporary Japan. Sora in Shibuya and Riku is looking at the Tokyo Metropolitan Government Building (or actually, he's in Quadratum, the world of Verum Rex). This is corroborated when we see Yozora, the protagonist of Verum Rex, staring from above.