Arguably the hardest switch
to find, the whole second part of the stage is a
mini-maze. It seems like it would be hidden somewhere
harder to reach. It's actually extremely easy. However, to
get it just keep heading south in the level by going
through the bomb blocks. When you come to a Broom Hatter
frantically sweeping and series of ladders leading up,
check out the nook below and it actually harbors a secret
door! Enter to grab the switch.