When you return the cat to Charlie's Carrot Surplus, you get a crowbar that you can use to enter the sewer pipe at the Carrot Cake Factory (far right by the water). On you way across the roof, get the Vent Blueprint from the window.
In the sewer, pick up the Carrot Transporter (which you normally would only use if you forgot the map), and climb to the "bottle cap" trap doors. Cross the first two quickly as soon as the cap snaps back up. Then cross the next two the same way. It is nearly impossible to cross all 4 at once. To get past the rat, climb into the loop of pipe above and slip past him.
On the factory floor, you will throw the three switches (middle one all the way down, other two halfway down) and climb to the upper left. You can ride the moving red crane arm to reach the vent entrance at the upper right.
The closed Carrot Cake Factory is to the right side of 24 Carrot Island. You will need a crowbar to get in through the sewer pipe at far right. (see related question)
Ratman is on Super Power Island. There is a large rat in the sewer entrance to the factory on 24 Carrot Island (climb up into the bypass pipe to elude him).
Return the missing cat to its owner and you will get a crowbar to pry open the sewer cover. (see related question)
the crowbar is use to open the door on the sewer.
24 Carrot Island is the 4th island of Poptropica. It came out in June, 2008.
The mayor of the town on 24 Carrot Island will give you the Island Medallion when you complete the quest.
24 Carrot Island does not have a cockpit. 24 Carrot Island was released in 2008 and the main objective of the game is to stop the evil Dr. Hare from controlling Poptropica.
At the carrot factory.
24 carrot diner isn't in shark tooth it is in 24 carrot
He is at the carrot factory.
He is in the carrot cake factory
in the air vent