Abigail "Abby" Tina Newton was a character that only appeared in Barney's Great Adventure. She never appeared in any of the TV Shows. She is played by Diana Rice.
- Family: Abby has two brothers, Cody, and Fig (both of which only appeared in Barney's Great Adventure as well). Cody is her oldest brother and Fig is her youngest brother (making her the middle child)
- Abby's best friend is Marcella (who also appeared only in the movie)
- Both of her grandparents live on a farm.
- Abby's dream is to be a jockey and win a horse race.
- Abby never appeared with Riff.