Game Boy - Did You Know Gaming? Feat. Jake of Vsauce3
In the Japanese version, there's a print icon that looks like a syringe. The image was replaced with a "Game Boy Printer" icon in the International version due to possible drug references.
Contributed by ProtoSnake
The photo on Neil Young's "Silver & Gold" album cover was taken with a Game Boy Camera.
Contributed by Pogue-Mahone
The Game Boy Camera had several images of Pokemon, and released almost 4 months earlier than Pokemon Red and Blue in North America, making the Game Boy Camera North America's Pokemon debut.
Contributed by CRANTIME
Selecting "Run" from the menu will bring up one of three drawn on faces, bearing the caption "Who are you running from?" Nobody knows why.

These faces are also shown without the caption when the system encounters an error such as attempting to print without having the printer connected.
Contributed by lividd3ad
Pressing B during the credits will reveal a clip of Shigeru Miyamoto dancing. It's hard to tell from the quality of the image, but it's generally accepted that it's him.
Contributed by DidYouKnowGaming
At the time of its release, the Game Boy Camera was the world's smallest digital camera.
Contributed by retrolinkx