21He Can Time Travel
The introduction of Future Trunks into the world of Dragon Ball Z brought with it the futuristic ability to time travel. Using the time machine build by Future Bulma, he tried to help his current timeline. In his first appearance in "The Mysterious Youth", he traveled back to the
past to warn the Z Fighters about the arrival of the Androids to their world.
He also hoped to find a weakness in the villains in order to stop them in his future timeline. In addition, he brought medicine for Goku to take to prevent his passing from an unknown heart condition. Since then, Future Trunks made additional trips throughout the DBZ timeline and into the new Dragon Ball Super series.