Bugs are Announcer's creation and pets. They appeared in Don't Pierce My Flesh, Insectophobe's Nightmare 2, and Insectophobe's Nightmare 3. They also made a cameo in Zeeky Boogy Doog. They were also mentioned indirectly in Take the Plunge: Part 1.
In Don't Pierce My Flesh, a single bug is seen on a railing on the bridge where Flower and Firey are seen. After Firey says that it is present, Flower gets a large hammer, and smashes it, and also smashes the bridge.
In Insectophobe's Nightmare 2, Flower throws an egg sac at Announcer after he said BFDI was cancelled. Announcer questions Flower about what she threw, and Flower doesn't know. Announcer thinks they are bug eggs. Later, bugs emerge from the eggs, and chase the final 4 and announcer. The bugs eat the TLC, and episode 24's recommended characters. Firey tries to set them on fire, but a bug expands in size, and eats him. The bug then catches on fire, setting other bugs on fire in order, which looks like a cellular automata simulation when viewed from above. The Announcer later presses the "Delete Bugs" button. Everybody except Announcer and David are dead, as David is bug-proof. Announcer uses a David Cloner to create Davids for the elimination. The contstants come back, saying that they faked their deaths.
In BFDI Is Back, a bug made a cameo on The Creatures Of Goiky on the cover on a piece of metal in the center.