Anything that has made only one appearance.
“Waluigi is Wario's brother, just like Luigi being Mario's brother. He only made his appearance...Waluigi
“Two old people only appear in 'Mario's Rock Band'. They are drowsy and sometimes get angry.Old People
“The Candyman is an extremely minor character only appearing once, in 'Mystery of the Stolen...The Candyman
Pages in category "One appearance"
The following 15 pages are in this category, out of 15 total.