In the Sewer with Ratman's Rats
It is a timing challenge. The rats move back and forth, and they will always knock you away. Time your jumps to arrive on the pipes when the rats are moving away. You will have to jump quickly to another point almost as soon as you land. Three jumps will take you to the red control wheel in the upper right hand corner.
Similarly, the flies are not going away, even once you splash them loose from Ratman. You will have to rapidly jump up between attacks, then leap left to reach the large pipe in the center of the room. From there, you can jump across to Ratman and cuff him.
You have to jump past the three at the upper right, to reach the red wheel there. This dumps sludge on Ratman and the flies attack you. Jump past them to the large center pipe, and then over to Ratman.
In the sewers on Super Power Island, Ratman is guarded by rats and stinging flies. When you find him, go right and jump the rats to reach the final red wheel at upper right. This dumps sludge on Ratman and the flies. Now they will chase and sting you. Go far right, then run back left and quickly climb the BIG pipe in the middle, from which you can jump to Ratman. The flies are always right behind you.
There are three red wheels that lower and raise the water in the sewer. But the one you use in the Control Room is at the upper right, and you have to jump past three rats to reach it.
When fighting Ratman in the sewer chamber, you cannot stop the movement of the rats. You will need to adjust the timing of your jumps to avoid being hit.
Ratman is hiding in the sewer under City Park, with his pet rats and stinging flies.
if you mean the one in super power island then you need it for catching one of the crooks(one that lives with the rats)
there is only one girl and her power is super speed
Once you enter the control room, climb past the rats at right to reach the final red control wheel. This will dump sludge on Ratman and the flies will attack you. Dodge them until you can jump to the large center pipe, and then to Ratman.
Unlike the rats and flies, the roaches are just a crawly distraction in the subway before you fight with Speeding Spike. You can't affect them at all.
When you face ratman and his rats and flies, climb to the red wheel at the upper right, which will dump sludge on Ratman. Jump quickly between the rats. Then avoid his flies to jump over to him and cuff him.
Super rats wear capes.
When you climb up to the right and turn the red wheel, it dumps sludge on Ratman and scares away the rats. However, the stinging flies attack you. Dodge them long enough to reach the large pipe in the center, from which you can jump over to Ratman and put the cuffs on.