on the factory window
The blueprints are rolled up in the window near the factory roof. If they aren't there, you already have them in your items. There is no reported glitch with the blueprints.
If you already have the blueprints to the factory vent system, go up into the factory. Otherwise, use the transporter to go back outside, and get the plan from the window near the roof.
He is at the carrot factory.
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).
fight
it is on the 24 carrot island on the gas station
The mayor of the town on 24 Carrot Island will give you the Island Medallion when you complete the quest.
24 Carrot Island is the 4th island of Poptropica. It came out in June, 2008.
right beside the cafe place.
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.
On 24 Carrot Island, the vent diagram is in a window near the roof. On Big Nate Island, the school blueprint is in Nate's locker. The secret map to the Time Capsule is under a rock on Seal-Saw Island.
At the carrot factory.