Professor Paradox

Professor Paradox (real name unknown) is an immortal time traveller, able to travel to nearly any point in time and/or space. He is confirmed to appear in Ben 10: Ultimate Alien, but it is possible that, due to his abilities, he will appear beforehand. He is portrayed by Peter Capaldi.

Personality
Professor Paradox will be keeping his calm yet eccentric, easy-going, and overall mysterious persona from the original canon.

Appearances
Professor Paradox is so far only confirmed for one appearance, but will likely get more.
 * Ben 10: Ultimate Alien

Powers
Due to him being displaced out of time for an indefinite amount of time (at least 100,000 years), Professor Paradox gained immortality. While being displaced from time, Professor Paradox had forgotten his true name, but learned the secrets of the time-space continuum. This gives him the ability to travel through and control time. His abilities are not limited to a single universe or multiverse, allowing him to travel to almost any reality.

Professor Paradox can regress a person's age.

Professor Paradox is able to teleport anything and anyone to another point in space and time.

Professor Paradox can slow down gravity's time to let him fly without being affected by it.

Professor Paradox can transform Ben back from his aliens.

Weaknesses
Professor Paradox is restricted by several laws of time, but what causes these laws of time is unknown. The current known laws he must abide by are: Professor Paradox's age regression power does not work on inanimate objects such as vehicles.
 * There are certain points in time and space he cannot go, such as prior to the beginning of time.
 * He cannot bring past and future versions of an individual together unless it is absolutely necessary.
 * There are certain events, called fixed points, that he cannot interfere with, but can still observe.

Professor Paradox is honest, meaning he is essentially useless in a scenario where lying is necessary.

Ben 10: Ultimate Alien
TBA

Trivia

 * Due to Professor Paradox's similarities with the British character the Doctor from Doctor Who, Peter Capaldi, who played the Twelfth Doctor, was chosen as the person to portray him. Ironically, Professor Paradox was inspired by the Tenth Doctor, specifically, who is played by David Tennant. Tennant was chosen to portray a different professor in the Cartoonverse.