Chronos Twin review at Zentendo.

"Chronos Twin, not to be confused with the Chrono Trigger series, blends arcade shooting with platforming rather nicely. Originally destined for the Gameboy Advance, the game was ported over to the DS platform the moment they found out about the dual screens. Taking a few years to port a game is rarely done, but in this case it was all for the better as without the careful use of the Nintendo DS, this game would be nothing."

Full Source: Zentendo via Gonintendo