The police will not let you go Downtown (right) from Main Street on Super Power Island. The guard at the County Prison is also blocking you. This is because you aren't a "real superhero" yet.
You need a Superhero ID Card from the "Masks and Capes" costume store. You can get a costume if you want, but it's not required. Once you are "official" you can go left to the County Prison, where the warden has a briefing for you on the escaped super-villains, along with some special handcuffs with which to apprehend them.
You will need to defeat 5 of the villains (Copycat, Speeding Spike, Sir Rebral, Ratman, and Crusher) using only your wits. Only then will you receive your super Flying Power to catch Betty Jetty.
(see related questions)
you beat it
To finish the island you need to beat super betty!
you beat all the villians
Dr. Hare is using mind-control rabbot ears on 24 Carrot island, and Sir Rebral is using telekinesis on Super Power Island. (see the two related questions)
you need to beat five villians on super power island
yes you just have to search "how do you beat super villain island" on this website
When you finish super power island and defeat all of the villains there is only one thing else to do - finish the other islands of course!
yes, there is. you get a flying power on super power island after you beat five villains.
You beat the island by defeating all the villians then you get the medal after talking to the towns people.
There is no simple way entirely to beating Super Power Island. But if you search a question similar to this then it gives you complete directions to beating the Island along with plenty of spoiler alerts.
Once you beat the first 5 super villains, you get the flying super power to chase Betty Jetty. After she is knocked out by Ned Noodlehead, he becomes a hero and gets the Island Medallion. Ned is in his comic book shop. He is too busy to be a superhero. Give him a hot dog and he will give you the Island Medallion.
Yes but you can't fly anywhere else but there. :( a bummer i know