Lunar Knights/Dark Castle Auguste

When you enter the Dark Castle, you will come into an area with a locked door, and four doors two on each wall, leading elsewhere. To unlock the Purple colored door you will have to make your way through each of the four individual sections. The first section on the lower left, with the red bubbling stand in front of it, leads into a room where there is a locked door, a pressure switch and a Hot Dog. To get into the lower area with the pressure switch you first need to make sure you are using the Arid Desert climate. Getting the Hot Dog on the switch is going to be tricky, but with time you will find success.