Game Boy Advance themed jam when ?
There already is "GBA Jam 2022" and it's currently running.
It's a jam where you make something that runs on the Game Boy Advance, it's completly different.
We won't be making a GBA themed jam any time soon. It's far too different to our main goal of four colours!
How about Game Boy Color ?
It sounds like you should just make the type of game you like!
but what if... you set one up yourself?