You don't actually enter, but you go there after you get your Superhero ID.
You can only talk to the warden and his chief scientist after you are an "official superhero." Go to the Masks and Capes costume shop and get your ID card. You do not have to wear a costume. You must see the warden and scientist at the prison before you begin chasing the escaped villains.
On the left of the island
Where you first enter, if you swim across where the water is you will find the prison.
from the scientist at the prison.
you have to go to the police station on the left when you enter super power island
When you arrive on Super Power Island, the County Prison is across the water to the left of Main Street. Once you have a Superhero ID from the costume store, you can go there for information.
When you have defeated a super villain, place the anti-power handcuffs on them, and they will be transported back to the prison.
You don't. The technicians gradually decontaminate it.
A giant meteor hits the island's prison house, and the prisoners get super powers from it.You have to be the hero and save the day.
The comic shop is the closest store to the County Prison on Super Power Island, the leftmost store on Main Street. It is run by nerdy Ned Noodlehead.
To win on Super Power island, you have to recapture all 6 of the escaped super-villains and return them to prison. After you catch the first 5 using your wits alone, you receive super flying power to chase the 6th, Betty Jetty. (see related question for full solution)
The island after Super Power Island was Spy Island.
You can't go Downtown to chase super-villains until you have your Superhero ID and the handcuffs from the County Prison. Get the ID at the Masks and Capes store, then you can see the warden at the prison.