Ghoulrilla king is a creature in Nuka-World.
These gorillas were part of the Safari Adventure attraction at Nuka-World and were preserved by radiation similar to human ghouls. Although unable to procreate, they have managed to survive among the ruins of the theme park and even managed to adopt a human baby, Cito, and raise him as one of their own.
Powerful creatures in their own right, the ghoulrillas are encountered not as foes, but as allies, and help the player clear the Safari Adventure park during the corresponding quest - that is, unless the player decides that they are better off wiping them all out.
Ghoulrilla king appears in Nuka-World.
References
