It looks like, based on a press release that got sent out today, that the paddle controller that came bundled with Arkanoid DS in Japan won't be seeing a release in North America. That is, basically, an unforgiveable crime. Seriously, why would you even want to try to play the game without it?
Another notable tidbit of info from the press release is a confirmation that both games will be budget priced at $19.99, which will help shoulder some of the cost of having to import the paddle controller (sadly, Play Asia only has pink paddles in stock anymore, so you'll have to wait or settle for that color). Both games are slated for a June 17th release this year.
Gallery: Space Invaders Extreme (DS)
Gallery: Arkanoid DS