Game Boy Camera

Smile! You're on Game Boy Camera!

The Game Boy Camera was a peripheral developed by Nintendo themselves for use with the Game Boy and its later revisions, and released in 1998. It's a somewhat bulky cartridge, with the actual camera inside a round "head" that can swivel 180 degrees, so you can either point it towards you to take pictures of yourself or turn it forward to use it like any other digital camera.

Because the Game Boy was limited to black, white and two shades of gray with a specific resolution, that also applied to pictures taken with the Game Boy Camera. While it doesn't have the color or quality of an actual digital camera, taking pictures is just a small part of what it can do. Navigating all the wacky menus and submenus allows for things like creating short musical beats, making animations with stored photos, snapping pictures with different lens effects, playing minigames with your face inserted onto an in-game character, trading photos between others with a Game Boy Camera, and printing photos with a Game Boy Printer.

Tropes used in Game Boy Camera include:

Button Mashing: To finish Run Run Run!, you have to mash A to run, and mash Up to flap when jumping over hurdles. If you win the race, you can even mash A to raise the flag in the background.
Endless Game: Ball and Space Fever 2 will go on until you lose.
100% Completion: Most of the included pictures in the B Album have to be unlocked in various ways, like doing well enough in the minigames, or taking/deleting/trading some number of photos.