Draining the moat
To do this you will need to find the key to the basement after you find it there are two ways to do it you either take the short way(like a cheat and could only be done with Mario or Luigi) or the long way(can be done by anyone in the game).
When I first did it I used the short way then the long way. The short way to do it is to get into the basement then look at the left you will see a slightly slanted slope covered by glass over it. Now to do it this way run under it(the glass) and after you run under it quickly jump and press the A button while holding the Y button and the top of the pad controller and if done correctly you should get to the top and then you ground pound the pillars. And for the long way go the way where the door is when entered go right left forward right and right again and right again if done correctly there is a door enter it go down the hole swim to the other side and ground pound the pillars.
Added by: Guest Dec 15th 2011, ID#16519