Pluto was a dwarf planet of Earth's solar system. Its orbit was tilted instead of level like the other planets orbiting the Sun and was orbited by 5 small moons.
In Cosmic Destruction, Pluto was mentioned as having long since been destroyed.
- Matt Wayne hinted that Pluto probably will appear again in some point of the series.
- Bellicus showed disdain of Pluto, considering it to be a dwarf planet, while Serena said she wanted it to be a planet instead of a dwarf planet.
- The second Ben 10,000 took his nickname after the second Plutonian revolt of 2022, which means that his version of Pluto was not destroyed.