Other TMS episodes that the Koozebanian Phoob could've appeared in

[TotallySpiesFan]

Other TMS episodes that the Koozebanian Phoob could've appeared in:

Avery Schreiber: in "Scat Song"
Ben Vereen: in "Pure Imagination"
Judy Collins: in the goodnights, in addition to the Koozebane sketch
Bernadette Peters: in "Just One Person"
Elton John: in "Bennie & The Jets"
Cleo Laine: in "Everybody Limbo"
Julie Andrews: in the cold opening
Petula Clark: in "Tomorrow"
John Cleese: in John's final number
Roy Clark: in "Pigs in Space"
Loretta Lynn: in the special opening credits
James Coco: in "Short People"
Danny Kaye: in "Inchworm"
Spike Milligan: among the people from 100 countries
Lynn Redgrave: as a bad guy
Shields & Yarnell: in the final number
Linda Lavin: in "Beyond the Blue Horizon"
Dudley Moore: in "At the Disco Dance"
Kenny Rogers: in "Love Lifted Me"
Lola Falana: in "United We Stand"
Star Wars: in the final number
Andy Williams: in "Green Door"
Diana Ross: in "Reach Out & Touch"
Gene Kelly: in "Singing in the Rain"
Brooke Shields: in "I'm Falling" and the trial scene
Glenda Jackson: as a pirate
Debbie Harry: in "One Way or Another"
Jean-Pierre Rampal: in "Veterinarian's Hospital"
Melissa Manchester: in "Whenever I Call You Friend"
Carol Burnett: in the dance marathon

He also could've been a patient on "Veterinarian's Hospital".