[quote name='Requiem']I'm not sure where the cheapeast pre-order is, but IGN said Tetris DS will be budget-priced (rightly so) in Japan. So it's safe to say it will be cheaper here. Probably $20-$25[/QUOTE]
Assuming the current $35 price tag for New Mario is correct, we'll be looking at no less than $25, probably $30*. I guess that's what they consider budget for the DS.
* Math for above: Mario price in Japan = 4800 yen, price for Tetris 3800 yen; Tetris = .8 * Mario -> $35 * .8 = $28