Throughout the Ben 10 franchise, various changes in the continuity, otherwise known as retcons, have been made. Below are most of the retcons made in the franchise.
Ben 10: Alien Force
- The Plumbers are now an intergalactic police force, when it was established in the original series that they were a secret government organisation comprised of humans only, and several with a racist attitude towards aliens.
- Gwen's powers are now alien in origin, inherited from her grandmother Verdona, as well as magical.
- The Forever Knights now have different factions instead of being one whole group.
Ben 10: Ultimate Alien
- The queen in Ben 10: Alien Swarm has been changed into a decoy queen created by the real queen to avert suspicion towards her.
- Ben 10: Race Against Time has been retconned into an alternate timeline and eventually removed from continuity.
- Eon was changed into an alternate version of Ben.
- Chronians do not exist anymore.
- Ben's future has changed.
Ben 10: Omniverse
- The universe and timeline have changed after Alien X recreated the universe and the series underwent a soft reboot.
- Some episodes were ignored or removed from previous continuity.
- The origin of the Galvanic Mechamorphs was revised from the original toy info.
- Ben's last encounter with Vilgax was when he was 11, though it was established in Alien Force that he last met him when he was 10.
- Max never met Kevin's dad, who didn't even exist - it was all a fake memory made by Servantis.
- Osmosians are no longer aliens; rather, they are humans with unique abilities.
- The Plumbers' Helpers now have different origins.
- Some elements of the future depicted in the original series were revised.