On Main Street of Super Power Island, go to the Masks and Capes costume store. You do not have to wear a costume, but you do need a Super Hero ID card.
The Superhero Handbook is at the Comic Book Shop run by Ned Noodlehead. But what you need more is the Superhero ID card from the Masks and Capes costume store.
The only items you need to get are your SuperHero ID Card (from the costume store), and the Anti-Power Handcuffs from the County Prison scientist. You will also get a dossier file on the six super-villains.
To catch villains, you DON'T need a costume, only a Superhero ID card. Once you have captured the villains, you can copy clothing from other people on the island or just take off some of your hero costume.
You will need to copy other clothes to replace the costume, using the Costumizer. NOTE : you don't need a COSTUME to fight the supervillains, just a Superhero ID Card.
You don't discover your super power... You have to go to the island left after you get your super power card they give you your power handcuffs.
After you catch each of the first 5 super-villains, you will be transported to the Prison to get credit on your SuperHero ID card. After you get all 5, the phone booth will ring, and you receive your FLYING power. *see the related question below
Once you have your official Superhero ID card (from the Masks and Capes store), you can swim to the County Prison to the left of Main Street. The warden will give you the files on the escaped super-villains, and his assistant will give you the special anti-power handcuffs to use on them.
Go to the Masks and Capes store and get your Superhero ID Card. With this, you can go to the County Prison (left of Main Street) and see the warden and the prison scientist. (You do not have to wear a costume.)
If you defeat the other 5 super-villains (using your wits alone) you will get the flying power you need to defeat Betty Jetty. After the fifth criminal is captured, the pay phone will ring on Main Street. Answer it to get your Super Flying power! (check your superhero ID card : each captured crook will be marked with a sticker) (see related answer for solutions)
First you go to the shop called Masks & Capes. They have some costumes, but more importantly, the official Superhero ID Card. (Now you can become a SUPERHERO!) (see related question) After you defeat your 5th villain, go to the ringing phone in the telephone booth and you will get super flying power. Then you can chase Betty Jetty.
After you catch each of the first 5 super-villains, you will be transported to the Prison to get credit on your Superhero ID card. After you get all 5, the phone booth will ring, and you receive your FLYING power. Then you can go to the top of the skyscraper and chase the sixth super-villain, Betty Jetty. (see related question)
Just one : flying power. After you defeat the other 5 super villains using your wits, you will receive super flying power, which you need to capture Betty Jetty atop the skyscraper downtown. The power only works on Super Power Island.