4-in-1 Fun Pak is a Fun Pak of 4 classic board games in 1 Game Boy cartridge.
The BEAM Mini-Gallery#
On bootup, starting from the second screen after the "Licensed by Nintendo" screen, the game starts counting Select presses. A total of 60 presses of Select trigger a set of doodles from the folks at Beam. Note that the counter resets between different screens.
Alternately, enable GameShark code 013C18C0 to boot straight into the gallery after the copyright screen.
(Source: cah4e3)