Dwayne Johnson as Dr. Smolder Bravestone, an archaeologist and explorer who is Spencer 's avatar. Bravestone 's strengths are stamina, courage, reflexes, climbing, smoldering intensity, and boomerang throwing. He apparently has no weaknesses. He is the archetypically masculine, intelligent, and courageous video game hero of the story. He is credited as "Spencer ''. Jack Black as Professor Sheldon "Shelly '' Oberon, a cartographer, cryptographer, archaeologist and paleontologist who is Bethany 's avatar. Bethany chooses him, mistaking the character 's name for that of a woman. Though Oberon 's strengths are his fields of expertise, because of his obesity, his endurance is his weakness. He / she is credited as "Bethany ''. Kevin Hart as Franklin "Mouse '' Finbar, a short zoologist and weapons specialist who is Fridge 's avatar. Fridge chose him due to misreading the character 's nickname as "Moose ''. Finbar is Bravestone 's weapon valet and is skilled in zoology. His weaknesses are cake, strength, and speed. He is credited as "Fridge ''. Karen Gillan as Ruby Roundhouse, a commando, martial artist, and dance fighter who is Martha 's avatar. Roundhouse is proficient in karate, tai chi, jujutsu and capoeira, and her only weakness is venom, such as that found in various animals in the game. Similar to Bravestone, Roundhouse is the archetypically intelligent, athletic, beautiful, and scantily clad video game heroine of the story. She is credited as "Martha ''. Nick Jonas as Jefferson "Seaplane '' McDonough, Alex Vreeke 's avatar. McDonough is a mysterious guide, adventurer, and pilot in the game, who waits for and joins the other avatars as they attempt to escape Jumanji. McDonough 's strengths are piloting and making margaritas. His only weakness is mosquito bites, which is bad for him since the jungle is teeming with mosquitoes. He is credited as "Alex ''. He lives in a treehouse built and once occupied by Alan Parrish (previously portrayed by Robin Williams and Adam Hann - Byrd in the 1995 film Jumanji). Bobby Cannavale as Russel Van Pelt, a corrupt explorer seeking to control the "Jaguar 's Eye '', whose power he is demonically possessed by. He is the boss of the film 's video game scenario; Jonathan Hyde played a different version of Van Pelt in the 1995 film. Rhys Darby as Nigel Billingsley, an NPC guide in the game. William Tokarsky as Bread / Cake Vendor, an NPC food trader. Rohan Chand as Boy at Bazaar, a young NPC guide.
who is the bad guy in jumanji 2017
Bobby Cannavale as Russel Van Pelt