Maxwell "Max" Tennyson is the future version of Max Tennyson.
Max wears the same shirt as Max Tennyson and blue pants with yellow lines down the side. He has a beard and a slight mustache. He also has a robotic arm that can turn into a laser gun.
In Ken 10, Max is much skinnier, his robotic arm no longer looks like a normal arm, and no longer has a beard.
In The End of an Era, Max has gained weight again, has more visible wrinkles and wears more futuristic clothing.
In The End of an Era, Max officially retired from the Plumber business for good and gave Rook Blonko his position as leader of the Plumbers. When the power goes out due to the sun flares Max volunteers to get the power back but due to Animo being released from his cell by Subdora, Max has to fight him and put him back to his cell. Later, he manages to get the power back thereby saving Ken from the clutches of Exo-Skull.
Ben 10: Omniverse
- The End of an Era (first re-appearance)