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.
No.
All you need is the official ID from the Masks and Capes store.
you can not.
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.
Apparently not. But there is a costume store.
you can't design a costume,but you can get a lot of different kinds
The masks and capes are permanent costume items until you remove or change them. Unless you purchase a costume, it is not selectively put on or taken off. You automatically lose your flying power when you leave the island, as it only works there.
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.
After you defeat five of the villains, you can fly. That's the only power you get. (But there are some pretty cool super suits at the Masks and Capes costume shop.)
At the Masks and Capes costume shop. (Costumes are not required, but free.)
You get one from the Costume Shop. You do not need to get a costume, but you need the ID to go to the County Prison, and to record your arrests.
Go to the Masks and Capes costume shop and get an official Superhero ID from the owner. You do not have to wear a costume.
It is not a costume. You earn the power to fly by defeating 5 of the 6 super villains using your wits alone. Then you will receive the flying power to catch the 6th one (Betty Jetty). (see the related question)
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.