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Doctor Cockroach: Forgive him, but as you can see, he has no brain.
Turns out, you don't need one. Totally overrated! As a matter of fact, I don't even... I forgot how to breathe! Don't know how to breathe!'
―B.O.B. and Doctor Cockroach to Susan Murphy[src]

B.O.B. (also known as "Benzonate Ostylezene Bicarbonate") is one of the deuteragonists in the DreamWorks film, Monsters vs. Aliens. He is voiced by Seth Rogen.

He was created by a genetically altered tomato with a chemically altered ranch flavored dessert topping at a snack food plant. He mainly seems to be kind of stupid and is constantly annoying the team with his stupidity. He also has a girlfriend called Jello with some pineapple chunks, he says that her is the only thing he deserves on this world.


  • He is a reference to the 1958 film, The Blob
  • He also appears in Madagascar Kartz as a playable character
  • B.O.B. is voiced by Seth Rogen who also voices Mantis from Kung Fu Panda and reprised his role of him in the holiday special and sequel.
  • His voice actor, Seth Rogen, sounds exactly like Bill Fagerbakke, the voice of Patrick Star from SpongeBob SquarePants.
  • Ed Helms, Zach Galifianakis, Nick Frost, Craig Robinson, John Goodman, David Denman, Seth MacFarlane, Steve Zahn, Ron Funches, Brett Gelman, Danny McBride, Nick Offerman, Kevin James, and Keegan-Michael Key were considered for the role of B.O.B. before Seth Rogen was cast.
  • In the Disney film Chip and Dale Rescue Rangers, he along with Mantis from Kung Fu Panda and Pumba from the 2019 live action Lion King film appear commenting on how Bob the Dwarf's eyes look weird. This is a reference to how all four characters are voiced by Seth Rogen.



v - e - d
Monsters vs. Aliens Logo
Films: Monsters vs. Aliens

TV Series: Monsters vs. Aliens
Shorts: B.O.B.'s Big BreakMutant Pumpkins from Outer SpaceNight of the Living Carrots

Main Characters: Susan MurphyB.O.B.Dr. CockroachMissing LinkInsectosaurusGeneral W.R. MongerGallaxhar

Support Characters: Zachary ThroneCarl MurphyComputerDerek DietlInvisible ManJelloKatieMutant PumpkinsPresident HathawayWendy MurphyWicked JackZombie CarrotsCovertonSqweepSta'abi

See also
Locations: AntarcticaModesto, CaliforniaParisSan Francisco