Of course when I say bullethell, i mean the one where theres a lot of colors going on and you have to dodge it all in a ship in stuff, not contra style.
Gonna mention Death Label too. Might want to check out Nanostray 1&2 if you haven't already. I don't know if you could call them "Bullet-Hell" though. But, at some moments it felt like I was playing a CAVE shooter. Damn, I hope the DS gets more SHMUPS some day.
Big Bang Mini can be pretty bullet hellish, but its stylus controlled and very different from a traditional shooter. Still gives you that same feeling of avoiding bullets by a hair's breadth, though.
There's that one game coming called XG Blast! for DS in Europe that Hadrian mentioned in one of his "Upcoming Releases" threads.......it's like a Robotron/cave-shooter. I wonder if that game ever got released in stores......