Special Dragon Balls

The Special Dragon Balls (特別なドラゴンボール Tokubetsuna Doragon Bōru) are a set of seven Dragon Balls utilized by Fu for the Prison Planet.

Overview
The special Dragon Balls are the key to leaving the Prison Planet, each one is held by a prisoner on one of the planets.

Anime

 * One-star Dragon Ball: Goku: Xeno
 * Two-star Dragon Ball: an unknown prisoner
 * Three-star Dragon Ball: an unknown prisoner
 * Four-star Dragon Ball: an unknown prisoner
 * Five-star Dragon Ball: an unknown prisoner
 * Six-star Dragon Ball: an unknown prisoner
 * Seven-star Dragon Ball: an unknown prisoner

Manga

 * One-star Dragon Ball: Goku: Xeno
 * Two-star Dragon Ball: Cooler, previously held by Bojack
 * Three-star Dragon Ball: Majin Ozotto
 * Four-star Dragon Ball: Cooler, previously held by King Cold
 * Five-star Dragon Ball: Cunber
 * Six-star Dragon Ball: Either Vegeta or an unknown prisoner
 * Seven-star Dragon Ball: Either Vegeta or an unknown prisoner

Game

 * One-star Dragon Ball: Majin Ozotto, formerly Goku: Xeno
 * Two-star Dragon Ball: Majin Ozotto, formerly Goku/Vegeta/Future Mai/Future Trunks/Cooler, previously held by Bojack
 * Three-star Dragon Ball: Majin Ozotto
 * Four-star Dragon Ball: Majin Ozotto, formerly Goku/Vegeta/Future Mai/Future Trunks/Cooler, previously held by King Cold
 * Five-star Dragon Ball: Majin Ozotto, previously held by Cunber
 * Six-star Dragon Ball: Majin Ozotto, formerly Cunber, previously held by unknown prisoner
 * Seven-star Dragon Ball: Majin Ozotto, formerly Goku/Vegeta/Future Mai/Future Trunks/Cooler, previously held by Hatchiyack

Trivia

 * In the manga, the Special Dragon Ball given to Vegeta by Fu is drawn with Seven-Stars, but when Fu is explaining about the prisoners who possess Special Dragon Balls, Vegeta is shown to have the Six-Star Special Dragon Ball while another unknown prisoner has the Seven-Star Special Dragon Ball.