OK, so now we are getting to the bottom of Who parody here, with Doctor Poo from Monster Fun Comic (1976). Haven´t been able to find any more info about this, more´s the relief.
This image is from the Cuttings Archive.
VIZ magazine did a Doctor Poo story in the June 1996 issue of the comic, and there is a flash animated version online, but I don´t have the sense of humour to look at this any further... if you do a quick web search I´m sure you´ll find it...
Doctor Who: Twelfth Doctor Year Three #7
2 days ago