yeap.





Tetris DS introduced power-ups. Any given Tetris piece contains a "?" block. Smash the line with the "?" to get the power-up. Here's a list of stuff you can do ...

mushroom = rocket blocks for opponent. These will fly down the screen.
banana = scrambles your opponent's current block pile
red shell = removes 2 lines
lightning bolt = freezes opponent's dropping pieces. They can't flip them.
ghost = hides opponent's preview blocks
etc.

While Blockles seems to trigger the action event on a line break, Tetris DS allows users to "save" the power up for later.