BJ Voices Through the Years (Thevideotour1's version)

Late 1990 -1993
BJ's voice is a huskier and deeper one, resembling Michael's from Season 2. It first appeared in "New Friends". It last appeared in "Barney's Five Kinds of Senses" (October 31, 1993).

Late 1993-1997
BJ's voice goes up to +3, which now resembles a mix of Adam's Late 1989-January 1991 voice and his Season 2 voice (Pitch +3). It first appeared in "Most Important Ways" (November 1, 1993). It last appeared in "Barney's Magical Musical Adventure" (December 20, 1997).

1997-1999
BJ's voice goes more higher and cheerful to +2 (Pitch +5). It first appeared in "First Day of School".

1999-2002
BJ's voice goes up go +3 (Pitch +8) and resembles Derek's 1990 voice.

2002-present
BJ's voice is silimar to his Season 6 voice, but more squeaker.