Barney's Friends & Guests Appeared on Barney (battybarney2015's version)

One of Barney's friends are the human, fictional for special guest characters appeared on Barney & the Backyard Gang in 1988-1991 and Barney & Friends in 1992-present.

Mookin
Mookin only appeared in the Barney & the Backyard Gang video Three Wishes.

Farmer Earl
Farmer Earl only appeared in Three Wishes.

Molly the Mermaid
Molly the Mermaid only appeared in the Barney & the Backyard Gang video A Day at the Beach.

The Snowman
The Snowman only appeared in the Barney & the Backyard Gang video and Christmas special Waiting for Santa. The same snowman reappears in Barney's Magical Christmas, A Holiday in the Park with Barney and We Wish You a Merry Christmas (video).

Santa Claus
Santa Claus appeared in Waiting for Santa, Barney's Magical Christmas, Barney's Night Before Christmas, We Wish You a Merry Christmas (video) and A Visit to Santa.

Mrs. Claus
Mrs. Claus appeared in Waiting for Santa, Barney's Magical Christmas, Barney's Night Before Christmas and We Wish You a Merry Christmas (video).

The Bear
The Bear lives in a cave. The Bear only appears in Campfire Sing-Along.

James Turner
James Turner only appeared in Eat, Drink and Be Healthy!.

Rainbow Beard
Rainbow Beard (played by Stephen White) only appeared in The Treasure of Rainbow Beard.

Mother Goose
Mother Goose appears in Let's Help Mother Goose!, Honk! Honk! A Goose on the Loose!, Barney's Big Surprise, the Barney's Happy Valentine's Day book (1998 and 2011 Versions), the Barney's ABC, 123 and More! book, A "Little" Mother Goose/Barney's Rhyme Time Rhythm, The Land of Mother Goose (episode), Mother Goose and The Best of Barney.

Patty
Patty only appeared in 1-2-3-4-5 Senses!

Greg Murrary
Greg Murray only appeared in Practice Makes Music.

Fergus McClaren
Fergus McClaren only appeared in A World of Friends.

Lesley Chudnow
Lesley Chudnow only appeared in A World of Friends.

Efei Almani
Efei Almani only appeared in A World of Friends.

Gloria Chen
Gloria Chen only appeared in A World of Friends.

Abundio Ortiz
Abundio Ortiz only appeared in A World of Music.

Rebecca Garcia
Rebecca Garcia only appeared in Hola, Mexico!.

Mr. Delivery Man
Mark S. Bernthal (played by Mr. Delivery Man) only appeared in Everyone is Special.

Twynkle the Elf
Twynkle the Elf only appeared in the Season 1 home video Barney's Magical Musical Adventure. She reappeared in the book "Barney's Happy Valentine's Day" book.

The King
The King lives in a castle. King appeared in Barney's Magical Musical Adventure, Barney's Musical Castle, The Land of Make-Believe and The Best of Barney.

David, the wheelchair-bound boy
David on the wheelchair appeared in the Season 2 episode Falling for Autumn!, and the Season 3 episode Shawn & the Beanstalk.

Granddad Richards
Granddad Richards only appeared with Derek in Grandparents are Grand! (1993).

Kathy's Nana
Kathy's Nana appeared with Kathy in Barney's Magical Christmas and Grandparents are Grand! (1993).

Clarence the Goose
Clarence, Mother Goose's pet goose first appeared in Honk! Honk! A Goose on the Loose!. He reappears with Mother Goose again, in the live show Barney's Big Surprise, the book Barney's Happy Valentine's Day, Barney's Rhyme Time Rhythm and The Land of Mother Goose (episode).

Mr. Bear
Mr. Bear only appears in Hoo's in the Forest?, and the same bear costume would later return in the Season 6 episode Listen to the Sounds in the Forest, the Season 6 home video Barney's Super Singing Circus.

Doug and Becky
Doug and Becky (from Kathy Burks' marionettes) only in Grown-Ups for a Day!.

Tomie dePaola
Tomie dePaola appeared in the television show Barney & Friends. He appears in 3 epsiodes "Picture This!," "It's Raining, It's Pouring..." and "Oh, Brother...She's My Sister."

Joe Scruggs
Joe Scruggs only appeared with Barney and his friends in The Exercise Circus!.

Joe Ferguson
Joe Ferguson only appeared with Barney, Baby Bop, BJ and the kids in My Favorite Things.

Jordan Kaufman
Jordan Kaufman only appeared in Stop, Look and Be Safe!.

Aunt Molly
Aunt Molly only appeared in The Alphabet Zoo.

Mr. Tenagian
Mr. Tenagain first appeared with Barney, Baby Bop and the kids in Having Tens of Fun!. He also appeared with BJ in the book Barney's Happy Valentine's Day, the Season 5 episode A Big Parade of Numbers (episode), the Season 12 20th anniversary special and home video The Best of Barney and the Season 14 home video A Counting We Will Go (video).

Tosha's Mom
J.D. Mosley (played by Tosha's Mom) appeared in A Very Special Delivery!, Imagination Island and Bedtime with Barney.

Tosha's Dad
David J. Courtney (played by Tosha's Dad) appeared in A Very Special Delivery!, Imagination Island and Bedtime with Barney.

The Winkster
The Winkster first appeared in Barney Live! in New York City. He reappears in the book, Barney's Happy Valentine's Day and the 20th anniversary home video special for Season 12, The Best of Barney.

Professor Tinkerputt
Professor Tinkerputt first appeared in the NBC prime-time special "Imagination Island." He returns in the live stage show tour "Barney's Big Surprise," showing Barney, Baby Bop, BJ and the audience to his new toy factory. Professor Tinkerputt appeared in the book "Barney's Happy Valentine's Day," the Season 5 epsiode "Barney's Super-Dee-Duper Birthday," the Season 6 home video "Let's Play Games with Barney," the fourth national stage show tour and sixth stage show in 2006-2007 "Barney Live! - The Let's Go Tour" and the 20th anniversary home video special "The Best of Barney." He was mention in Come on Over to Barney's House and Barney's Dino Dancin' Tunes.

Stella the Storyteller
Stella the Storyteller appeared in some episodes in Seasons 3-6. She also appeared in other Barney home videos, Once Upon a Time, It's Time for Counting, What a World We Share, Once Upon a Magical Tale and The Best of Barney.

Mr. Boyd
Mr. Boyd first appeared in the Season 3 episode "Classical Cleanup." Mr. Boyd appeared in some Barney episodes from Seasons 4-8 and the home videos. He return in the 20th anniversary home video special in 2008 "The Best of Barney."

Firefighter Frank
Firefighter Frank first appeared in I Can Be a Firefighter! and More Barney Safety.

Cambodian Dancers
Camodian Dancers only appeared in Any Way You Slice It.

Reggie the Deliveryman
Todd Everett (played by Reggie the Deliveryman) only appeared in Hats Off to BJ!.