Influenza tontonbū-gata
The title of this article is official, but it comes from a non-English source. If an acceptable English source is found, then the article should be moved to its appropriate title.
The Influenza tontonbū-gata (インフルエンザトントンブー型, pig-type flu) is a mysterious illness that appears in the last chapter of Super Mario-kun volume 7.
While preparing a party for Mario and Luigi, the Mura Mura citizens fall ill of the influenza tontonbū-gata, and they all turn into pigs. Once Mario, Luigi and Yoshi arrives, even Luigi gets infected and is turned into a pig as well. The Mura Mura chief explains that a cure exists in the form of the Star Hana. Mario and Yoshi finds the Star Hana on top of a Chō Dossun, and Mario defeats him by injecting him with the same flu, turning the enemy into a pig and taking the flower from his head without any problems. Later, Mario cures Luigi and the Mura Mura citizens.