TEC-XX

TEC-XX is the main computer in the X-Naut Headquarters in Paper Mario: The Thousand-Year Door. Most of Grodus' captives, including Princess Peach, call him TEC. He usually helps Princess Peach get information on what Grodus is planning and has this crush on her. He also claims to be the "flawless and perfect" computer. After Mario and co. completed Chapter 6, his memory of Peach was deleted after Sir Grodus caught Peach in his room after he tells Peach that the X-Nauts are planning to offer her as a vessel to the Shadow Queen. The minute he meets Mario and his teammates after Mario and co. complete Chapter 7, he tells Mario and the team Peach was taken to the Palace of Shadow. He's running on a backup generator after his memory was deleted, unfortunately, he starts to go haywire and eventually, ceases to exist, destroying X-Naut HQ in the process. At the very end of the adventure, he is still alive and the X-Naut HQ is up and running again, although the whole place is deserted. He seems to have been restored to his original state after Peach gave Mario the last of her power during the battle with the Shadow Queen.

Trivia
TEC is clearly based off of the HAL 9000 in 2001: Space Odyssey because of his intelligence and security systems. Though unlike HAL, TEC isn't insane or malevolent.