Solving an island quest involves completing all of the tasks for that island. You will know when you finish because you receive the Island Medallion.
**For links to solutions to all current Poptropica islands, see the related question.
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On each island in Poptropica, you must complete the island quest to earn the Island Medallion. In 2009, the completion also awarded 100 Poptropica credits per island.
Early Poptropica, and Spy Island.
Complete a mission on a island like Early Poptropica
You would have to specify the island you are asking about.
You complete all the necessary tasks.
Look at this.Poptropicasecrets.com
You have to complete the island to unlock that surprise.
The easiest island to complete is Early Poptropica.See the related question below for the guide.
To leave, use the Poptropica blimp on Main Street. (To complete the island, see the related question.)
you complete quests and earn medals then go on to the next island
You complete it and get the jewel