The DS "punch card" is such an elegant idea for a card input. Rather than requiring a card reader or a camera to take pictures of the cards,
you just stick the card on the screen and touch the screen through holes in the card. Spectrobes
and Monster Rancher
both take advantage of this extremely inexpensive feature, and Capcom has picked up on the idea for their sequel to Mega Man Star Force.
Two such cards will be given as a preorder bonus in Japan, each of which unlocks a suit (and corresponding weird animal-head arm).
Capcom was smart enough not
to include the positions of the holes on the preview images, so unscrupulous people like us can't print out the cards and do it ourselves. Not that it really matters with a free bonus item.