Spencer is a tough , muscular explorer and archaeologist named Dr. Smolder Bravestone ; Fridge is a diminutive zoologist named Franklin `` Mouse '' Finbar ( the latter 's nickname being mistaken by Fridge as `` Moose '' due to the game 's font ) ; Bethany is an overweight male cartographer named Professor Sheldon Oberon ( who , through the use of his nickname , she mistook for a female ) ; and Martha is a female commando and martial arts expert named Ruby Roundhouse .
In Jumanji : Welcome to the Jungle , Fridge mistook the nickname of `` Mouse '' to `` Moose '' , and Bethany thought that Professor Sheldon Oberon was a woman based on the latter 's nickname .