#88 - Wario and Waluigi

Mario Tennis' website states Wario and Waluigi are brothers. However, Waluigi's Pinball description in Mario Kart DS' website says they're siblings, M&S at the Rio Olympic Games says they aren't related, and Waluigi's trophy in Melee says it's unclear.

SOURCE 1: https://web.archive.org/web/20000817231440/http://www.nintendo.com:80/n64/mariotennis/waluigi.html

SOURCE 2: http://microsite.nintendo-europe.com/mariokartds/ (check Waluigi Pinball)

SOURCE 3: https://www.mariowiki.com/images/7/74/MS_Rio_2016_Wii_U_-_Mii_Dialogue.jpg

SOURCE 4: https://themushroomkingdom.net/mariopedia/trophy/waluigi.jpg