The hotel manager is based upon the legendary British TV character Basil Fawlty, from Fawlty Towers. Fawlty, played by John Cleese, was also a hotel manager who was notorious for being rude to his own guests.
In the German dub, Grinder's name is Fletcher, Nanny offers a marzipan carrot instead of a chocolate one, and Duckula spends his drachma on gummy bears instead of jellybeans.