Demolition Dragon and Concussive Canyon Habitat are available for all android players too, but only on the main version of the DS or the Winter version.
You can find them in the "FEATURED" tab of the market.
If you are playing the Halloween version, you won't find them there.
So, if you want to buy them, you can load the main version or the winter version once, buy them, exit the game and then go on playing with the Halloween version