While there are many methods and hacks for reliving some of the best moments that eight-bit gaming has to offer, there exists an infinitely simpler way to get Nintendo GB and GBC tiles such as Pokémon, Mario, and Zelda on your iPhone. But there's something else you can do to play eight-bit Nintendo games on your iPhone right now.
Nintendo may be developing cases that'll turn your iPhone into a gaming device like the Game Boy, but until something materializes there, you're stuck with cheap knockoffs on Amazon or a real Game Boy or Game Boy Color.