Zubs and Coach B
From Homestar Runner Wiki
Zubs and Coach B are Bubs's head and personality atop Coach Z's body and Coach Z's head and personality atop Bubs's body. It is unknown which one is which. They were presumably rendered this way by Strong Bad, who referred to them by their names in an Easter Egg in current status, in which they made their debut. Neither of them like being this way, but Strong Bad describes the result as being "Pretty Hilarious".
 Complete Filmography
|Coach Z variations|
|Fort Wayne Locomotive | 20X6 Coach Z | Renaldo | Coach B or Zubs | Coach Zed | Damp Towel Man | Zoach C|
|Old-Timey Bubs | The Thnikkaman | Shark-Tooth Bubs | Baron Darin Diamonocle | Bubsamecium | Zubs or Coach B | King Bubsgonzola Supreme | Dry Ragamuffin | Original Bubs | Onion Bubs | Bubz|