There are prisons (of sorts) on at least three islands.
Super Power Island
The prison is to the left of Main Street, across the bay. You can only go there when you have acquired your Superhero ID from the Masks and Capes store. You have to go to the costume store, then the Prison, before you go into the other areas where the super villains are.
Red Dragon Island
The Fortress is up the large steps in East Edo. You can climb to it to get a message from Jack and Annie, who are imprisoned there. You do not see the exterior when you are arrested yourself, because you can use the Amulet to escape back to the Tree House.
Ghost Story island
The prison is in the bay across from the Inn, to the right, while the Lighthouse is to the left. You should go to the Lighthouse first, leave the thermometer, and then go to the prison. When you return to the Inn, you will be called back to the Lighthouse again to see the Keeper.
(see the related questions)
On Super Power Island, Copycat is in the bank vault, Speeding Spike is in the subway train, Sir Rebral is in the City Park, Ratman is in the sewers, Crusher is in the junkyard, and Betty Jetty is on top of the Skyscraper.
For information on beating these villains, see the related question.
There are guards on a few Poptropica islands.
(see related question)
At the bank, deposit your 50 dollars and the dog will scratch the floor. Then an icon in the bottom left corner will appear. That's where he is.
Read more: Where_to_find_prisoner_24601_on_poptropica
When you are on main street go to the far left past the water and there should be an island with the prison on it
When you get to a comic shop you go left you should have to pass through water
the prisoners can be found across the water to the left!!!
-ShaeBae
at the bank deposit your 50dollars and the dog will scratch the floor then an icon in the bottom left corner will appear thats where he is
Jack and Annie are imprisoned inside the Shogun's room, so you need to go there. However, you need to be a ninja. Also, you need to scale the walls and pass three rooms.
go into cell D8 where the prisoner used to live. the ghost of the warden will lock you in there. push the bed aside and go into the hole. us eyour thermal scanner and look up to the top. you will see a shape. go up there and on your way collect the sardine can, a note, and the pickaxe. the shape will be the ghost of prisoner 24601. go back into the cell and escape by using the pickaxe.
after you find 24601 on poptropica find a place where you have to crack the code
Get on the ship, and travel to the island where the prison is. Find the warder. He will give you the location of the escaped prisoner's cell. He will lock you in. Move the bed to find a hole. In the hole, use the thermal sensor to find him. He is the ghost under the bank.
24601
you go back where you came in and then you take the pickax and it will lead you out
go to the lighthouse, a little northwest of the main island.
you take your pik axe that you found in the tunle under the bed.then you walk over to the opisit side of the room andclick on the corner on the bottom and you dig out
The records show that convict 24601 was on Level D. If you go to cell number 8, you will find your answers. Slide the bed to one side and you will find the escape tunnel.
24601 is Jean Valjean number in Les Miserables
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The two ghosts in the prison are those of the warden and the prisoner. To speak with the warden, you have to set the plate of Hot Cross buns on the table in the Warden's Office. He will then give you information on the prisoner. After you enter the prisoner's cell, the Warden will lock you in. Push aside the bed and enter the tunnel. Accquire the pickaxe and sardines, and at the top of the tunnel, speak with the prisoner. Use the pickaxe to dig a new tunnel in the left side of the cell to escape.
You don't help him escape.