Big Challenges (ビッグチャレンジ, Biggu Charenji) is an alligator character from Sanrio. Gallery Add a photo to this gallery Sources Big Challenges Profile on Sanrio.co.jp This article is a stub. You can help Hello Kitty Wiki by adding to it. Categories: Characters Universe Unknown Gender Unknown Alligators 1970s Unknown Birthdays Community content is available under CC-BY-SA unless otherwise noted.