Tesla robot

The Tesla Robot is a Vault-Tec security robot model implemented in the company's Secret Vault. Like its "relative" security robots, it is three-legged orb-like walker. Tesla Robot uses powerful electric blasts generated by special Tesla device mounted on it, to attack possible threats to well-being of the Vault. However, no security robots could protect the Secret Vault from an army of Super Mutants.

The Vault-Tec also developed a program called "Mr. Buddy". It was a special bodyguard programming implemented into Tesla Robots, probably to help scientists from the laboratories to feel much more safe when going up into Wasteland or doing research on living subjects. However, "Mr. Buddy" was never finished and left in Beta state. There are some terminals in the Vault laboratories which could be used to summon three special Tesla Robots, which could be used against Super Mutants by the Initiate.

Robo-Bud MK-I
This one looks and acts exactly like a normal Tesla Robot but a little more powerful.

Robo-Bud MK-II
This one is a bit larger than normal Tesla Robot, and also stronger and resistant.

Prototype Robo-Bud MK-X
This one is a prototype, improved model of Tesla Robot. Surprisingly, it's very small than normal Tesla Robot, only a bit bigger than Service Robot. But the MK-X is very strongest and it could obliterate many Super Mutants in few seconds.

Appearances
All Tesla Robots appear only in Fallout: Brotherhood of Steel.