Jumbo was one of Allan's closest associates after the Karaboudjan mutiny. He was one of the sailors, along with Tom and Allan, who pursued Tintin inside the Karaboudjan. Jumbo is first seen notifying Allan that Captain Haddock wants to talk to him. Allan later brings Jumbo in to guard the porthole inside Captain Haddock's cabin, in case Tintin comes through. However, it turns out Tintin was hiding in the locker under the bed. Allan then returns to find Jumbo tied and gagged to a chair, with Tintin, Haddock, and Snowy long gone.
In the animated television episode of The Crab with the Golden Claws, Jumbo is shown to be one of the thugs who tailed Bunji Kuraki near Tintin's apartment on Labrador Road. He, Tom, and Pedro are then caught by Tintin, but fight him off.
Jumbo was originally portrayed as North African in the original black-and-white edition of The Crab with the Golden Claws and the first colour edition. However, when Western Publishing of America was adapting The Crab with the Golden Claws into English, their censors objected to Jumbo being in Allan's gang, calling it "race mixing". Western Publishing asked Hergé to redraw Jumbo's panels. He obliged, but only to alter Jumbo's caricature-like appearance, which had become dated by the late 1950s. In the animated television series, Jumbo is depicted as being of mixed heritage.
- Farr, Michael. Tintin: The Complete Companion. San Francisco, Last Gasp, 2002. pg. 96