Future Android 16 appears identical to his main timeline counterpart, however throughout almost all of his appearance he possesses a dark aura and pure red eyes due to being reprogrammed by Towa.
Little is known of Future Android 16's original personality as in Xenoverse 2 he is reprogrammed by Towa to serve the Time Breakers and empowered by Dark Magic. As a result of his reprogramming he is a loyal servant to the Time Breakers.
He tasked by them with eliminating Future Gohan in Age 780 altering the history of Trunks' timeline slightly by killing Gohan before he dies fighting 17 & 18. He seems to retain his counterpart's animosity towards Goku, as he refers to Future Gohan as the son of Goku, hinting that like his counterpart his original goal was to eliminate Goku, but that goal effectively rendered mute by Future Goku's death from heart virus and Towa's reprogramming. It is possible that Towa's reprogramming transferred his animosity towards Future Goku over to his son. Unlike his counterpart, Future 16 lacks his gentle nature and is instead a ruthless killing machine, similar to Future Android 17 and Future Android 18, though it is unclear if this is his original personality or the result of Towa's reprogramming.
"Must destroy... Goku's son..."
— Future Android 16 in Dragon Ball Xenoverse 2
However some of his original personality can be seen in a few Parallel Quests set in an alternate version of Future Trunks' timeline. In these parallel quests, he is somewhat similar to his main timeline counterpart, joining Future 17 and Future 18, though he is more willing to fight others such as Future Trunks, Future Gohan, and the Future Warrior, presumably due to the death of Future Goku making him less focused on fulfilling his programing. However instead of focusing on his now impossible mission of killing Future Goku, the normal Future 16 seems intent on destroying Future Gohan and it is implied by Future Android 17 that Future Dr. Gero programmed Future 16 to hunt Gohan, likely after Future Goku's death from the Heart Virus.
Like his main timeline counterpart, Future Android 16 was modeled after Future Dr. Gero's deceased son, a high-ranking Red Ribbon Army soldier who was killed in action by an enemy bullet years before the army's destruction at the hands of Future Goku.
At some point, Future Android 16 was created by Future Dr. Gero, however he was never activated. His fate in the original future timeline is unknown, though presumably he remains inactive inside Dr. Gero's Lab.
Other Dragon Ball stories
Dragon Ball Xenoverse 2
In the original history of that timeline, Android 16 was never activated. However, in Dragon Ball Xenoverse 2 he is found, reactivated and revived by Towa who she reprograms with Dark Magic turning him into a member of Time Breakers.
In Age 780, he is sent by Mira to kill Future Gohan before he is killed by Future 17 & Future 18, altering the history of Future Trunks' timeline. However the Future Warrior (Xenoverse 2) appears to stop him from altering the history of Trunks' timeline. Future 16 fights both the Warrior and Future Gohan, but is defeated by the pair forcing Mira to take matters into his own hands, causing Future Trunks to defy orders and save Future Gohan from being killed by Mira, who is forced to retreat due to his inability to overcome the combined might of the 3 warriors. However Towa manages to repair Future 16 and then sends him to Age 785 to kill Future Trunks' past self as he returns from the past following the Cell Games. However the Future Warrior once more appears to stop him, forcing Future 16 to team up with Dark Future Perfect Cell. However the Future Warrior and Trunks manage to defeat and destroy them both, ending the threat of the Androids in Trunks' timeline and restoring the history.
In parallel versions of Future Trunks' Timeline, Future 16 is reactivated by Future 17 & Future 18 like their counterparts did in the main timeline. He joins them in their rampage and in Parallel Quest 43: "Change the Future" they attack Future Gohan and Future Trunks, so the Future Warrior must intervene and help the two surviving Z Fighters escape. Later in Parallel Quest 44: "Dragon Balls of the Future", the Dragon Balls mysteriously appear in the Trunks' future timeline without Future Kami. Future 16 detects their presence and informs Future 17 & 18 who decide to collect the Dragon Balls to make a wish. Though he doesn't understand how the Dragon Balls can exist in his time, Future Trunks becomes determined to keep them out of the Androids hands and the Future Warrior can assist him in collecting the Dragon Balls before the Androids do.
- Video Games
According to the Supreme Kai of Time, the Future 16 originally should be far weaker than Future Trunks' after he returned to Age 785 in his timeline following the Cell Games. However Towa managed to increase his power to the point that he was a threat to Future Trunks' life, requiring the Future Warrior to intervene in order to prevent Future Trunks' death, which would threaten the existence of Xeno Trunks. However even with the power enhancement he receives from Towa, Future 16 proves to be no match for both the Future Warrior and Trunks, forcing the Time Breakers to send Future Perfect Cell in as back up. However both he and Future Cell end up being defeated and killed by the combined might of Future Trunks and the Future Warrior putting an end to the Red Ribbon Androids' reign of terror in Future Trunks' timeline.
It is unknown if he originally possess the same power level as his main timeline counterpart or if he is weaker than him like Future Android 17 and Future Android 18 who are weaker than their main timeline counterparts.
- Flight - The ability to fly without the use of ki.
- Power Radar – A scouter-like device embedded within the android's eyes (sensors) that can detect energy level and location. His Power Radar can also act as a primitive Dragon Radar allowing him to detect the presence of Dragon Ball via the unique energy signature they produce. Named in Xenoverse 2.
- Eye Beam - A synthetic form of Eye Laser. One of Future 16's Super Skills in Xenoverse 2.
- Rocket Punch – A technique where Android 16 launches one of his arms or fists at his opponent in the manner of a rocket, and then it explodes on colliding with someone or something. It is Android 16's signature attack and one of his Super Skills in Xenoverse 2.
- Hell's Flash – Android 16 lifts his opponent and tosses them to the ground, then he removes his hands, revealing two built-in cannons, and charges up energy before shouting "Hell Flash!!" to release a powerful beam of energy that scorches the opponent.
- Energy Field - Future 16's Evasive Skill in Xenoverse 2.
- Bloody Sauce - A dark Energy Sphere technique that Future 16 acquired from Towa after he was rebuilt following his defeat by the Future Warrior.
- Android Rush - A rush attack used by Future 16 as one of his Super Skills in Xenoverse 2.
- Rocket Tackle - A dashing shoulder block attack that appears as one of Future 16's Super Skills in "Parallel Quest 43: "Change the Future" in Xenoverse 2.
Main article: Villainous Mode As a result of being reprogrammed by Towa, Future 16 gains access to Villainous Mode. In this form, he is stronger than he would be historically and gains a dark aura and glowing red eyes.
Main article: Supervillain Mode After being repaired by Towa follow his defeat in Age 780, Android 16 is capable of using the imperfect version of the Supervillain state by shaving off some of his life which gives him a black/white aura and glowing pink eyes. In this state he is stronger than Super Saiyan Future Trunks in Age 785 after returning from the Cell Games, though Future Trunks survives thanks to the intervention of the 2nd Future Warrior.