Stretch Monster

Jonathan Rook, as known as the Stretch Monster is the main antagonist of the Netflix Superhero cartoon Stretch Armstrong and the Flex Fighters. He is the CEO of Rook Unlimited (formerly Rook Limited) in Charter City. Rook is voiced Wil Wheaton, who also voiced Michael Morningstar in Ben 10: Alien Force and The Stretch Monster is voiced by the late Miguel Ferrer, who also voiced Deathstrokein Teen Titans: The Judas Contract, and then David Kaye, who voiced Megatron in Beast Wars and the Unicron Trilogy, after Ferrer's death.

Origins
As a child Rook helped some kids gain more speed on a roundabout by having them use the slide for more momentum. After witnessing his work help the kids, Rook wanted to use his intelligence to help people's lives. 8 years later Rook was to win 1st in his school's science fair with his invention a coffee alarm clock, and then won the next three science fairs after. However, Rook's mother was dying from a disease, and was given the opportunity to join the Epsilon Society, the world's most prestigious science organization whom Rook has dreamt about joining his whole life with his mother encouragement. Upon arriving at the warehouse that the Epsilon Society wanted to meet him at, they reveal that they have been watching him for time, and want to offer him the chance to do the best work of his life and with the world's greatest scientific minds with all the resources he needs, on the condition that he abandons his name and family so he has no emotional distraction. After Rook tells that he can't abandon his mother while she is ill, the Epsilon Society disappears. Rook then returns to the hospital, only to sadly that his mother has died. After Rook started his company called Rook Limited (which would later become Rook Unlimited) with his mentor Dr. Racine Cleo (Dr. C), and begin working the Dashtis to turn Charter City into a Futuristic place for people to live in.

The Flex Fighters
To be added

Personality
Rook appears to be a kind helpful person who wanted to make Charter City a safe place and help the citizens of the city. But he is really a cunning manipulative liar, who is willing to do whatever it takes to get he wants.