Tohl Narita: “This is from a Toho kaiju only with its head replaced.”
Narita’s description of Pagos is so plain as if showing the unwillingness he had when designing a kaiju to be remodeled from the existing Toho kaiju Baragon.
It is said that this episode was originally planned to feature Gomess that was revealed to have an organ to breathe out a molecule destruction ray in this episode, but it seems that, as Gomess had been restored to Godzilla the costume was based on and returned to Toho already, they decided to feature a new kaiju instead that was to be Pagos capable to breathe out the molecule destruction ray.
I have just known the sculptor of the Pagos head is described as Ryosaku Takayama on the Net although I put it “unknown” in my Kaiju Pictorial entry for Pagos (I corrected it already).
Along with the head design done by Tohl Narita, Takayama’s head sculpture is just excellent and impressive enough to make the kaiju look fully attractive although the body was from Baragon.
The back part of the head looks a bit different between the drawing with Pagos on all fours and with the kaiju standing on two feet.
I have also found it is explained online that the Baragon body was used for Nelonga, Magulla and Gavora in “Ultraman” after being used for Pagos in “Ultra Q,” and, after the use at stage shows as NELONGA, the costume was returned to Toho where it was restored to Baragon again to make it appear in the 1968 Toho movie “Destroy All Monsters.”
Ultraman Episode 9 in which Gavora appeared was originally planned to feature Pagos instead, but the idea seems to have been dropped to use the Nelonga head as it was.
Such a transition eloquently tells us how robustly the Baragon costume was made by the Toho art staff at any rate given it got to appear as Baragon finally again after being reused that much as different kaijus.