XANA's Nanobot

In the episode Amnesia, XANA created a nanobot and injected it into Mrs. Hertz's collection of nanobots. Later, as a prank, Odd put the nanobot unknowingly on Ulrich's nose, where it crawled into his nasal passages and into his brain, where it wiped clean his memory centers, giving him amnesia. When Sissi came to visit Ulrich in the Infirmary after he fainted, the nanobot spread to her body, then to Herb's, Nicholas's, and eventually to the rest of the school's, giving them all memory loss. Once the Tower XANA had activated was deactviated, Jeremie activated a time reversion. This time, Ulrich burnt the nanobot substance to end the threat.

XANA's Robot Army

XANA's Robot Army were products of the Siberian Research Facility and Replika 4. The robots were designed to destroy all humanity. XANA, ever since building his replikas has assigned each replika to build a function of this robot for example: Replika 3 was making Cybertronic Brains. The Robots are believed to be late version of XANA's Original Robot in Season 1. The robots had the ability to fire lasers from their wrists. Their weakness was the Eye of XANA plate on their left shoulders. The army was supposedly shut down permanently when XANA was destroyed in Fight to the Finish.

Kiwi 2

The Kiwi 2 was a robot created by Jeremie Belpois for the Annual Robot Competition in the episode The Robots. It was modelled after Odd's dog, Kiwi. Kiwi 2's choice of movement was mechanical legs, and it used its mouth to pick up the basketball in the competition. It was destroyed by Iron Sissi's metal nut firer the first time in the competition. After the XANA attack, Jeremie activated a time reversion and used his previous knowledge to dodge the Iron Sissi's deadly weapon.

In Canine Conundrum, the appearance of Kiwi 2 has changed as seen in the images below, this could be possible that Jeremie redesigned him. XANA possessed Kiwi 2 in the same episode and caused it to multiply as a large group of deadly attack dogs.

XANA's Robot

XANA created several robots in the episode The Robots. At the beginning of the episode, XANA built a prototype and tested it at the end of the Annual Robot Competition. This robot had no extra weapons, was still quite dangerous. It was shut down by Herb's Hummingbird Robot. After Ulrich goes to the Factory with Yumi to assist Odd in getting Aelita to the activated Tower, it is discovered there is a whole army of robots. These robots each had a new weapon; large guns that shot metal nuts, clearly an idea XANA picked up from Herb's robot, the Iron Sissi. One of these robots almost killed Ulrich, but Jeremie activated a Time Reversion just at the right moment to save his, and many others', lives.