Ben 10,000 has become a full-time hero. He is tall, more muscular, and sports a full-beard. The Omnitrix has also changed in appearance, becoming bulkier and more gauntlet-like in shape. He no longer needs to conceal his identity and is recognized everywhere as Ben 10,000, no matter what alien form he is using.
His nickname comes from the fact that now Ben has access to at least 10,000 alien forms (he says he stopped counting), he also has unlocked the Omnitrix's Master Control, allowing Ben 10,000 to switch forms at will, without timing out.
Ben 10,000 (Episode)EditHaving been fighting crime for such a long time, Ben 10,000 has grown into a strict and serious character, stopping naming his aliens and has a darker way of dealing with villains, such as defeating Vilgax by literally mutilating him (according to a pop-up, this happened when Ben 10,000 was 15), though his interaction with his younger self causes him to lighten up somewhat, renaming his aliens. Ben's alien forms have aged with him, which is evident in their appearances and abilities. For example, Ben 10,000's XLR8 is noticeably taller with gray outlines in place of the ordinary blue, as well as being considerably faster.
In Ken 10, he aged 10 years, has less hair on his face, and has grey hair on both his sides.
- Ben 10,000 appears to favour XLR8 over any other aliens.
- Ben 10,000 unlocked the Master Control. It is unknown if he is aware of how many aliens are in the Codon Stream or if he has only used 10,000 of the possible 1,000,903.