Until I heard the proper pronounciation, as a kid I thought Nidoqueen was pronounced "Nido-ken". Yep, that was before I knew how to english.
Others includes Pokémon named the same way in french as in english (Tentacruel, pronounced Tan-ta-crew-hall in english is pronounced "tan-ta-cru-L" (capital L is how the letter L is pronounced in english)).
Last but not least, the french name for Hitmonchan (Tygnon) should be pronounced "Tai-nyon", but instead I used to pronounce it "Ti-nyon".
Down + Right + Focus Punch = Nidoken !