Comment by JoshM33k

Oh, interesting! For those of you not versed in the intricacies of playground GBA link cable gaming, this protocol was used to link multiple GBAs, where one would have a cartridge and the others would not, and they would receive the game over the link cable. These single-cart multiplayer experiences were almost always very rudimentary, because as Torgo says, you're loading the entire payload in memory.