Robert Anthony "Robbie" Rist (born April 4, 1964) is an American actor. Originally a child actor, playing Cousin Oliver on The Brady Bunch and Doctor Zee on Galactica 1980, Rist is now a voice actor and musician. He voiced Whiz on Kidd Video, Michaelangelo in the original Teenage Mutant Ninja Turtles film series, Choji Akimichi on Naruto, and currently plays Stuffy on Doc McStuffins and Mondo Gecko on the 2012 Teenage Mutant Ninja Turtles cartoon.