|This article is about a/an monster in Battle Fever J.|
The Study Monster (ベンキョウ怪人, Benkyō Kaijin) is the thirty-eighth of Egos' Monsters. He had a large pen that could crystallize things on contact and could return to him if thrown. Study Robot had an identical pen except it caused explosions instead of returning if thrown.
- Study Monster were designed by character designer Ryuu Noguchi.