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Mario starts of the bottom of the level underneath some ground above him. Mario must go right to activate the road then use it to make a bridge across either of the spikes with the one up top getting Aqua Men to go across the bridge and possibly having them fall onto the spikes if timed right, then Mario must quickly go left then climb the long ladder drop off it by going left to activate the other road which Mario should use to make a bridge across the one that doesn't have one. Then Mario must very quickly climb up the long ladder then at the top go right where there's two little platforms sticking out on both the right and left side which he must use so he doesn't fall to far, then he needs to quickly go across the bridge to get to the other side. There's two ladders one before the spikes and one after the spikes so Mario can retry if he didn't make it across the first bridge or the Aqua Men are still in the way. Once over the bridge Mario must climb up the ladder while watching out for possibly one Aqua Man if it's in his way and once there's room he once jump up to a platform above spikes that has the key then Mario has to grab the key then jump up to the platform with the door then take the key over to the door to end the level.
Pauline's lost items
Within this stage, Pauline's lost items can be found in the following order and in the following places: