Depending on where you first catch up to her, either 6 or 7 sets of balls. Each set will contain either 4 balls or 1 ball (which spins around more). If you stay back, you have a better chance to Dodge them. If you get hit, the number of sets required will increase.
Betty Jetty's not on TimeTangked Island she's on Super Power Island
To finish the island you need to beat super betty!
There are no weapons on the island. Betty Jetty can throw energy balls at you.
You Have to defeat all the villains on super power island except Jetty Betty.
The hero who defeats Betty Jetty will receive the Island Medallion! (hmm...see the related question)
She can be found either the Super Power Island or Reality TV island (sometimes)
The jetpack is only used on Early Poptropica. There is no jetpack on Super Power island. Catch the first 5 super villains and you receive super flying power, so that you can chase the flying villain, Betty Jetty.
When it rings, pick it up. The pay phone will ring when you have defeated the first 5 super villains on Super Power island. You will receive your flying power, which you need to defeat the 6th villain, Betty Jetty.
All you can get is the flying power, and only on that island. 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.
You only get one power : flying. Defeat the other 5 super-villains and you receive the flying power to catch Betty Jetty. (see related question)
At the end of Super Power Island, you go to the phone booth. (click on it) Then, you will get flight!!!!!!!!! You have to defeat Betty Jetty!!!!!!!!!
Open the booth when you have beat all the other villains besides Betty Jetty. Then you should get the power to fly and put Betty behind bars. :)