Innocent Island is the island Rockhopper gets the fruit on before he goes to Club Penguin Island for the Adventure Party: Temple of Fruit. It is home to tons of Fruit and the Temple of Fruit (until Rockhopper took it to Club Penguin). It seems to be inhabited by the Innocent Gang, as they are seen in Rockhopper's story and have made huts out of fruit. It is very tropical, and there are many palm trees.
The ancient history of the island is unknown, though somewhere in the timeline of the island the Cursed Volcano formed, along with the evil Big-Big Kahuna. Knowing it would be dangerous, Rockhopper took it to Club Penguin Island so penguins could destroy it with Fruit. It is unknown when the Innocent Gang began living there, or how they managed to make huts out of fruit.
Also, some things on the island are a bit unrealistic, such as the volcano with raspberries shooting out of it. It is unknown if it formed naturally (most likely), or the Innocent Gang made it. This makes it a very special island. Its landforms are almost made entirely of fruit.