Well, dreams do come true. At least for some of us. I'm proud to present to you BennVenn's 128m cart, housed in a gba shell! (Full disclosure: I'm not trying to take credit for anyone else's idea/hard work. I just think this is really awesome!)

It's all pretty straight forward and pictures are worth a thousand words:

Needs to have the notches filled in to flip the DMG switch in the GBA:

Video:

Final Thoughts:

This was flashed prior to BennVenn updated his LSDJ patch. I'd like to be able to get it flashed with the updated rom so I don't have to deal with the multiple roms.

I would also like an extender of sorts to be able to fit the cart into a normal gameboy. Obviously this is counter intuitive, and a mega mem currently works fine for this purpose.

Speaking of mega memory, that also seems to work fine with this. With the sav limitations in my current rom, it only restores the first song of a sav to the first rom on a cart. I'm assuming the new patch will eliminate this.