Tonton

is Tsunade's pet pig, often kept in the care of Shizune. She does not speak in any human language, but still manages to get her point across by whining in her own unique tone (a "buhi" or "oink" depending on the language). It seems that Tsunade and Shizune are able to understand what Tonton is trying to say. Tonton's nose also seems adept at tracking things, such that Pakkun has some familiarity with her.

Trivia

 * In the video games Naruto: Ultimate Ninja 2, Naruto: Ultimate Ninja Heroes 2: Phantom Fortress, and Naruto: Ultimate Ninja 3, Tonton is used by Shizune in "Hog Style: Tonton", which is a jutsu that throws Tonton at an opponent while spinning upward.