Defeat the giant spear man (Go to the cellar!!)
From the Super Mario Wiki
The most prominent feature in this level is darkness. There are several dark rooms that can be lit by hitting a Switch Block. However, when the light is turned on in a room, a light in another room will go out so the player has to keep that in mind and use it to his advantage. After the giant spear man is found and defeated, the level is cleared and Wario can move on.
Hidden Treasure: Torch
The hidden treasure of this level, the Torch, can be accessed from the area with the Pecans and the three dark sub-rooms. From there the player can find a door, leading to a room with the treasure, in the upper left room when the light is turned on. However, when the room in front of the door is illuminated, the room behind the door becomes dark and vice versa. The treasure door however is only visible when the light is on, so the player has to think of another way. He should turn on the light in the area with the three sub-rooms, learn where the door is exactly located, turn the light off again and enter the (now invisible) door with the aid of his memory. The room behind the door will then be lit and the treasure can be found at the bottom.
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