Gaming The Wireless Adapter Screen of Mystery

[Tombstoner]

I often liked to mess around with this, but I never could figure out what it was for. For those of you who don't know what I'm talking about, here is how to get to it:
With the wireless adapter in your GBA, load it up and hold Start and Select.

 

[whoomph]

It's for multiplayer with a single cartridge. Some games had that option.

 

[8BitWalugi]

It was pretty much 'GBA Download Play'.

Not many games used it.

 

[Tombstoner]

Thanks!