Combination Island

Dr. Combine has combined the islands! Can you de-combine them before the Great Wall of Combination Island is completed?

Characters
The majority of the characters are from the following islands:
 * Early Poptropica
 * Shark Tooth
 * Time Tangled
 * 24 Carrot
 * Super Power
 * Spy
 * Nabooti
 * Big Nate
 * Astro-Knights
 * Counterfeit
 * Reality TV
 * The Mr. Men Show
 * Homestar Runner