Andrew D. Kaboom, or Andy for short, is a rude, foul-mouthed and short-tempered bomb built by Tex using parts of a protocol robot and some of her 'personal items' with the intent of killing O'Malley. He is voiced by Nathan Zellner.
Andy is very self-aware in regards to his weight. In "Two for One", after O'Malley repeatedly calls him "bowling ball", Andy asks Caboose if he is that fat, claiming that he has been working out. When Sarge steals Andy, he remarks that Andy is much lighter than the last time he tried to pick him up and Andy is relieved that someone has noticed. Ironically, when Andy was first introduced he was too heavy for anyone except for Caboose to carry, but eventually he becomes light enough for others, such as Tex and Sarge to carry with ease. Andy is also known to make all sorts of rude comments, usually ending with a "Zing!"
- While his full name is never revealed in the series, it is shown in his Season 4 bio.
- He was originally meant to be Sheila's ex-boyfriend. However, this idea was pushed to Season 5, along with, according to Matt Hullum, "a really interesting character trait related to that Andy's relationship with Sheila."
- Andy only reappeared twice, in the Epsilon recreation of the Blood Gulch events in Season 9, and when a malfunctioning computer calls his answering machine in Season 11.