Can't believe you found a Japanese copy of Double Dragon Advance
in your loft
. Been looking for that for ages now but it always seems uncommon or pricy. I refuse to but the US carts in case they're fakes.
Tbh I thought they where all lost and a lot of my friends mint Jap GBA games I was picking up and sending onto Nokgod.. I still regularly play the Double Dragon cart probably my favourite GBA game, funnily my parents bought me it Double Dragon Advance' as a Birthday present
.. I thought I had binned all the boxes, and was up the attic looking for some something for 'Nokgod' and found them in the box..
Some of the boxes are ruined other mint, I just thought kept the boxed stuff and maybe sell the lose games with one of the spare GB Colour's