It seems that Noriyoshi Ikeya who took over the art designing from Tohl Narita was initially upset about the bolt out of the blue.
When he had a hard time in designing Space Bacterium Dally, the first monster he designed, it is said to have been Ryosaku Takayama, kaiju suits modeler, who suggested Ikeya to distort the shape of the human body for the design so that it doesn’t look like a suit worn by an actor.
Among the aliens and monsters Ikeya designed for Ultraseven, it is known that Pandon was drastically changed from the original design Ikeya drew.
As to Pandon, I have to admit I found it less striking as a kid than Zetton to culminate the final episodes of the series.
While Takayama sculpted Pandon according to Ikeya’s design in which Pandon was to be a two-headed monster, the two heads were combined into one finally at the crew members’ judgement on the set.
Because they found the operation of the two heads which were supposed to move separately should be very hard.
Ikeya regretfully said in a recent book interview that, although he protested against Koichi Takano, SFX director, saying it should be their job to manage it even though it’s challenging.
But there was nothing Ikeya could do about the Pandon already remodeled before he knew.
I found it hilarious when I read an article recently published saying the change which made Pandon look like kushikatsu (Japanese dish: deep-fried skewered pork) was really regrettable while I think that’s a nice way to put it.
The change should also have been definitely disappointing to Ikeya.