Professer's Radscorpion is a character in the Fallout series. He is a scorpion and appears in Fallout 2.
The Professor's Radscorpion is a special form of Radscorpion that only appears in Fallout 2. This Radscorpion has been genetically altered to be super intelligent. Professor's Radscorpion can speak to the player, a feat which no other Radscorpion can accomplish. On top of being able to speak, this Radscorpion can also play chess.