Grundel

Grundel is a super mutant residing in the first level of the Mariposa Military Base facility at the time of Fallout 2.

Background
Grundel is a particularly dumb second generation super mutant. The mutation rendered him very strong, which helps him to forage for food (mice of varying sizes) in Mariposa. His definition of mice is pretty broad and includes the Chosen One, who's apparently a big mousy and thus good eating for Grundel.

Appearances
Grundel appears only in Fallout 2.