The Wallarians (sometimes Walarian) were a species which were great sportsmen. They were known as great gamblers and traders and were famous for the Great Wallarian Exhibition.
The Wallarians were mentioned by Vorg. Shirna and Vorg met the Wallarian wrestler Zarb at the instellar exhibition. (TV: Carnival of Monsters)
Kist Magg Thek Lutiven-Day Slitheen briefly mentioned his brother Glune Fex Fize Sharlaveer-Slam Slitheen purchasing some plans from a Wallarian. (TV: Revenge of the Slitheen)
Sarah Jane Smith got some futuristic controllers from a Wallarian trader. Clyde Langer and Luke Smith used them to play a video game about the Battle of Waterloo on Mr Smith's screen. Sarah Jane said that she was not sure that this was quite the use the Wallarian Trader had in mind for these. (PROSE: The Last Sontaran)
The Duke of Dominoes was the trump card in an old Wallarian game of chance. It beat all other suits. In 1931 the Master was called Dook Domini by Father Sherrin and many others, a name which was inspired by the trump card. (PROSE: The Duke of Dominoes)
When Frobisher thought about Sabalom Glitz he had come to the conclusion that Glitz was about as trustworthy as a drunken Walarian. (PROSE: Mission: Impractical)