You go to the rooftop
There are no cheats on Poptropica, only the proper solution to the quest. The second spy is the easiest to rescue, because saving the First Spy gives you the Laser Pen to cut the metal bars on the rooftop window. (see related questions)
Saving the second spy is not complicated, but requires timing. Go to the building on Toupee Terrace that has electrified doors and windows. Jump up to each window while the power is off. When you reach the roof, use the Laser Pen to cut open the bars. Go inside and untie the second spy. He will give you the Grapple Bowtie.
The bars can be cut with the Laser Pen, which you get from saving the spy at the dock. The three spies have to be saved "in order", to get the spy devices you need. The first spy, at the docks, is rescued using the Chameleon Suit. The second spy is saved using the Laser pen. The third spy, on the rooftops above Balding Avenue, is rescued using the Grappling Bowtie that the second spy gives you. (see related question)
Saving the second spy is not complicated, but requires timing. Go to the building on Toupee Terrace that has electrified doors and windows. Jump up to each window while the power is off. When you reach the roof, use the Laser Pen to cut open the bars. Go inside and untie the second spy. He will give you the Grapple Bowtie.
Just close the page
the second spy is on top of the roof in that little house thing and you go in with your camo suit.
From the second spy you rescue.
You have to rescue the three spies in order, because the first spy gives you the item to rescue the second spy, and the second spy gives you the item to rescue the third spy. The first spy is in the warehouse at the Docks, the second is in the electrified building on Toupee Terrace, and the third spy is in a greenhouse on the Rooftops above the Grease Monkey garage. (see related questions)
It is the Second Building on Main Street on Spy Island on poptropica.com.
You have to rescue the three spies in order, because the first spy gives you the item to rescue the second spy, and the second spy gives you the item to rescue the third spy. The first spy is at the Docks, the second in the electrified building on Toupee Terrace, and the third on the Rooftops above Balding Avenue. (see related questions)
the laser pen
The spy at the electrified building is the second spy you have to rescue, as they have to be saved in order. The first spy to be rescued is at the Docks, and when you save him, you receive the Laser Pen, which can cut through the attic window bars and reach the second spy.