None of the costumes does anything at all. Sorry.
The costumes n the costume shop are purely for decoration. You only get your own super power once you have defeated the five villains, then use your super power to defeat Jetty Betty.
Turn the red wheel on top of the last ledge.
If it's a purchased item, just select the card and push "take off". Costumes on Super power Island have to be taken off by wearing something else.
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.)
The island after Super Power Island was Spy Island.
No, there is no "super strength" on super power island glad to help :D
The subway is Downtown on Super Power Island.
There are no cheats in super power Island.
Go as far as you can to your right in Super Power Island.
Yes, that is how I completed super power island!
you can't get speed on super power island
There are 6 villains to defeat on Super Power Island.
The force shield is not an item on Super Power Island