To get through Super Power Island, use the following steps.

Go to the comic shop and ask Ned Noodlehead if he sells anything besides comics. He will give you a somewhat helpful book.
Go to the costume shop and buy a costume if desired. Then, ask the man on the left for an ID card. Swim to go over the police red tape. Get the items you need from the scientist and the policeman.
To defeat Copy Cat, just destroy all her clones and her by jumping on them all before the smoke bomb starts to make you cough. Then, click on her.
To defeat the villain on the train, make sure he does not make contact with you by jumping up every time he tries to crash into you. Then, click on him.
To defeat the villain in the Junkyard, climb up onto the "crane" and click the switch. Then, pull the lever down. He will get squished for a few seconds. He will then start throwing things at you and knock you off the crane. Get back on the crane, then pull the lever in the other direction and he will get crushed. Then, click on him.
To defeat the villain in the park with mind powers, jump up and click him so he gets annoyed. Then, push a rock close by to him and stand next to it. If you placed it correctly, he will try to lift up the ground underneath you, including the rock, which should then hit him and knock him over. Then, click on him.
To defeat the Rat villain (in the toilets, men's room for male players and lady's room for female players), go down the sewer and play with the water controls until you can get up to the exit. Exit, then get to another control area by avoiding evil rats. They will knock you over if you touch them. Once you have clicked on the control wheel, a swarm of bees will chase you. Jump up onto the pipes quickly and click on the person before the bees knock you over.
You have now defeated five villains. Go to the ringing telephone. Click on it and you will be able to fly. You can now defeat Betty Jetty.
Follow her in the sky and avoid all the green things she flings at you until she falls down. Ned Noodlehead will step in and accidently save the day by bumping into her. Click on her.
Ned is now the town hero. If you want the medal that is rightfully yours, get a hotdog from the stand and go to the Comic Shop. Trade it with Ned to get your medal.
Super Power Island: Open Season 2 costumes
Go to the right of the Daily Paper then enter and go to the top. You can choose between a bear or deer costume from Open Season 2.