|Behind the scenes|
|First Appearance:||Tintin and the Lake of Sharks|
|Last Appearance:||Tintin and the Lake of Sharks|
Gustav is a big brown dog belonging to siblings Niko and Nushka in Tintin and the Lake of Sharks. He is best known for saving the plane with Tintin, Snowy, Captain Archibald Haddock, and Thompson and Thomson.