Go to your future self and talk to him.
There is no prize for beating all of Poptropica's islands.
yes you get a medallion and 100 poptropica points
For each island completed, you get the Island Medallion and 100 Poptropica Credits for the Poptropica Store. The Haunted House game awards 50 credits. There is no special prize for completing all the island quests. (see related question)
The prize for seeing Nessie on the Cryptids Island Preview was a Nessie hat.
after you defeat 1 island you get 100 credits. just think of how many credits you can get!
No you don't get a prize I myself have completed every island and did not get a prize but I think if your a 1st 10 finisher I think you get a prize but I haven't been one so I don't know for sure well bye.
money and medal
I've already beaten all the islands, but nothing came up. It seems like there should be a prize for doing it though. -Nervous Comet
you win all the games on the boardwalk and get the jumbo prize then u trade the kid with the helicopter the jumbo prize and the you use the helicopter to snag the money
MEDAL
Applebees12
A Nobel Prize consists of a diploma, a gold medal, and a monetary award. The diploma and medal are typically awarded in a grand ceremony in Sweden, and the monetary prize varies in amount depending on the category of the prize. The medal features the image of Alfred Nobel, the founder of the Nobel Prizes, and each prize category has a unique design.