How do you get a drgonache on viva pinata ds

First you have to buy a mine from the builder. Then either make a candary from a sparrowmint by giving it a buttercup or just buy one. Next buy a gas mask for the candary and send it into the mine. The candary will then find the egg in the mine but it might take a couple of times. Just keep sending it into the mine till it gets the egg. You need a cluckle to hatch the egg. It won't hatch by it's self and depending on where you hatch it, it'll be a different color. On water=blue soil=brown grass=green hard ground=gold. Then you'll have a baby dragonache. Then you just have to do what it tells you and you'll have the adult version.