There is no dungeon called final island, if you mean western cave then the answer would be mewtwo
Sunburn - 2004 was released on: USA: 4 July 2004 (video premiere)
There is no key to the dungeon. The small key open Mordred's underground laboratory, which has a back way into the dungeon. (see the related questions)
use the amulet
Blizzard Island You have to defeat Froslass in Blizzard Island to rescue him.
you have to go inside the dungeon on that island and find the exit on the other side
Goron Island! Where else?!
One of the robots was captured and is in the dungeon.
At the Goron island dungeon
next to a bookshelf.
The dungeon on Astro-Knights Island in Poptropica is located inside the castle on the left side of the main room. You can access the dungeon by climbing down the ladder next to the statue of Mordred on the top level of the castle.
If you are talking about the new skills dungeoneering dungeon. Then it is at the back of al kharid bank. You need to take a boat ride from there which will take you to island. You need to go on top of the island where you can start the game.