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- “B.O.B. this is. Big-O-Blaster built by Mingy and me. Life force from ground, plants and creatures it can suck.”
- —Blobbelda, Banjo-Tooie
The Big-O-Blaster (also formatted Big O'Blaster and often shortened B.O.B.) is a powerful mechanical blaster built by Mingella and Blobbelda, located in Cauldron Keep. It is capable of sucking the life force of any living beings by blasting them with a laser beam, transforming its targets into lifeless zombies. This can also work in reverse, giving the life force stored in it back to someone.
In Banjo-Tooie, Mingella and Blobbelda intended to use the Big-O-Blaster to restore their sister Gruntilda's body, that became simply a skeleton after being buried under a boulder for two years by Banjo and Kazooie. Gruntilda first stole King Jingaling's life force in an attempt to restore her body, but it alone wasn't enough. After that, she decides to blast the entire Isle O' Hags as that would certainly absorb enough energy to complete her objective. However, in order to do that, the device needed a long charge-up. In this period of time, Banjo and Kazooie manage to arrive the tower where the weapon resided, defeating the witches and successfully restoring King Jingaling, his palace and Bottles, who was killed much earlier in the game.
In Banjo-Pilot, the Big-O-Blaster appears as part of the background of the Cauldron Keep course.
Banjo-Kazooie: Nuts & Bolts
In Banjo-Kazooie: Nuts & Bolts, the Big-O-Blaster is mentioned by the Lord of Games during his quiz. In one of the questions, he asks "what was the name of Grunty's giant life-sucking gun in Banjo-Tooie," with the right answer being "B.O.B." and the wrong answers being "A.L.F.," "S.U.X.X.O.R.Z." and "E.R.S.A.."