DNAliens

DNAliens are 1/2 any alien species 1/2 Xenocytes who serve the Highbreed despite their racism (or, rather, speciesism). They often use ID Masks that can make them look human. They thrive on cold weather, so fire damages them beyond repair. A DNAlien was showed as a new alien for Ben in Ultimate Alien, however Dwayne has comfirmed DNAliens are hybrids, not a species, so they are not in the Codon Stream.

Ben 10: Alien Force

 * Ben 10 Returns: Part 1 (first apperance of Human type)
 * Ben 10 Returns: Part 2
 * Everybody Talks About the Weather
 * Max Out
 * Plumbers' Helpers
 * Darkstar Rising
 * Undercover
 * Grounded
 * Inside Man
 * Birds of a Feather
 * Unearthed
 * War of the Worlds: Part 1/War of the Worlds: Part 2

Ben 10: Ultimate Alien

 * Simian Says (first reapperance of Human type)(first apperance of Arachnichimp type)

Victims
DNAliens are created when a Xenocyte bonds with a host and is forcibly turned it into a DNAlien, as explained by one in which the DNAlien half of the parasite controls the host half because the host half is "repulsive" to them. These parasites were going to be shipped off in large trucks, possibly all over Earth, but were destroyed thanks to the efforts of Jetray, Gwen, Kevin, and Gwen's brother, Ken.
 * Ken_DNA.png example of these parasites is when Ken was forcefully turned into an almost-complete DNAlien and when Ben tried to remove it, he somehow entered the Omnitrix, which asked Ben for the option to remove the "severe genetic damage" caused by the Xenocyte and is completely removed by the Omnitrix.
 * In Inside Man, Tyler is transformed into a DNAlien but somehow resisted the "DNAlien programming"; so he looked like a DNAlien, but possessed his own mind (even though he was confused in the beginning). Ben, Gwen, and Kevin rescue Tyler from the DNAliens who wanted to reprogram him. Ben then transforms Tyler back into a human.
 * Ben and his team turned the DNAliens back into humans using the Omnitrix and a weapon that has the same effect created by Cooper.
 * As seen in Ben 10: Alien Force: The Video Game, Xenocytes can merge with other species. However, they are unable to attach to Crystalsapiens and Petrosapiens, likely because their structures are too dense to merge with. It is unknown if they have an effect on a more mechanical species, such as a Galvanic Mechamorph but they can merge with hybrids like Kevin.