Ambush Bug is an adventurer who always seems to cause more trouble than good for those around him; regardless of whether he is with heroes or villains. Possessing a lack of linear logic, Schwab always seems to get caught up in complicated, universal events.
Brum-El of the planet Schwab sent his clothes from his doomed planet in the hope that his wardrobe would survive, only to have it intercepted by a giant radioactive space spider. In the resulting crash, only two articles of clothing survived: one of which was the Ambush Bug suit.
Irwin Schwab, a man raised solely on watching television, somehow came into possession of the suit and, naming himself after the Ambush Bug insect, decided to become a villain, fighting against Superman and other heroes using miniature robot bugs that reside in his antannae to teleport himself from place to place. After a while, Ambush Bug decided to be a superhero and a friend to Superman instead. Achieving about as much success as he did when he was a villain, while trying to fix one of his miniature bugs, it exploded and caused a chain reaction that destroyed all of the bugs and tinted his costume temporarily black; he then became capable of teleporting without the bugs, however, he was also unable to take off his suit as the zipper had stuck.
- Ambush Bug can be found both in the Hall of Doom and the JLA Watchtower near the Legends PVP vendors.
- Ambush Bug contacts both Hero and Villain players at level 6 to inform them about The Vault, starting the short Vault Ambush! mission.
- Ambush Bug randomly spawns in the opening mission of the game, only making a passing comment to the player before teleporting away.
- Ambush Bug is the objective of the Debugging Duos Feat, which involves finding and talking to him in each Duo.
- Ambush Bug is the objective of the Quit Bugging Me Feat, which involves finding and talking to him in each Duo.
- Ambush Bug first appeared in DC Comics Presents #52 (December 1982).
- The voice for Ambush Bug was provided by Tracy W. Bush.
- Ambush Bug is known to constantly break the fourth wall and talk about events from other comics, games or movies and sometimes directly addresses the audience.
- In the comics, Ambush Bug can actually see the speech bubbles that come out of characters' mouths, and once asked Zatanna why the text in her's is backward.
- Ambush Bug is an avid comics reader, commonly seen reading one in his cameos; however, he claims to just read the captions and balloons and skips over the pictures.
- As a running gag, Ambush Bug sometimes teleports into the Batcave and lowers Batman's chair at the Mainframe by 6 inches.
- When not otherwise occupied, Ambush Bug can be found acting as a bartender at the Croma Zone bar; a bar popular amongst immortals and time travelers. Croma Zone is said to be the best place to get any cocktail from any era.