how much flash memory is in a standard nintendo ds cartridge?

[wrapperjrracing]

I have been looking at the graphics and elements of nintendo DS games and I can't see how some games fit on small amounts of flash memory. How much can the card hold? My guess is that it holds up to 2 GB, but was that information ever released?
I'm talking about how much in games released by nintendo, not homebrew or the DS's theoretical capabilities. A standard cartridge like mariokart or pokemon platinum or something like that.

 

[Josh P]

I don't think the capacity was ever released to the public, but your guess is probably really good.