The 1999-September 1st 2002 Season 6 Barney costume is used

The 1999-September 1st 2002 Season 6 Barney costume is used first was "Barney's Afterschool Activities (1999)" (September 6th 1999) and "Season 6" episodes (November 1st 1999 to April 14th 2000) ended was "Do the Dino Dance!" (September 1st 2002).