The names of the voice actors in the credits of the English-language version are fake and many of the aliases have sexual connotations. Bill Timoney stated that this was due to the actors being disgusted by the film.
The credits of the English-language version claim that the characters Nagumo and Niki are voiced by different actors, Danny Bush and Randy Woodcock. The characters actually share the same voice actor, Bill Timoney.
The character Nagumo's name was originally misspelled as "Magumo" in the ending credits of the English-language version. The Blu-ray release corrected this typo.