Here's a list and links:
Nanoloop - 4 channel madness with FM synth abilities on Gameboy/Gameboy Color.
Nanoloop2 - 8 channel madness with FM synths on ALL channels on Gameboy Advance
Looper - Primarily a sampler but has granular synth abilities...on Gameboy Advance.
PSPSeq - This is nothing but virtual analog synths with digital edge...for PSP.
PSPRhytym - Groovebox with a TB303 emulator built in...for PSP.
I'd suspect the only reason that DS-10 exists is because of these programs I mentioned. Show some support and give credit where credit is due. Sure, Korg is great and the DS-10 sounds awesome...but there's readily available synths for your game systems already...
I hate to post this song yet again, but I will...everything except the amen and the other obvious drum loop are the only samples on the song below...everything else (including the synth drums) are realtime synthesis). I think it kind of whoops the DS-10 in terms of power and it's free.
EDIT: It's PSPSeq, btw.
http://runjump.iiichan.net/rendered/rjr ... pre-eq.ogg
However, there IS something alluring to doing a tune with a stylus...

