The Other Darrin: Averted with the English dub of the sixth OVA installment; Steve Bulen and Edie Mirman, who voiced Yoh and Emu in the first five OVA installments (which were dubbed by Streamline Pictures), reprised their respective roles despite this one being dubbed in Texas by ADV Films.
Trivia for the live-action film:
Vancouver Doubling: The live-action film is set in San Francisco, Shanghai, New York, and Vancouver. The entire film was shot in the latter.
Same Language Dub: In the live-action film, Julie Condra (Emu) and Tcheky Karyo (Netah) were dubbed by an (uncredited) Deborah Kara Unger and Ron Perlman, respectively. Director Gans justified the decision by saying he wanted Emu to have a deeper, sultrier voice, and felt that Karyo's French accent didn't fit his character. Gans had originally approached Unger for the role of Emu, but she turned it down due to being busy with pre-production for Crash.
Throw It In!: Mark Dacascos and Christophe Gans improvised the choreography of the climactic swordfight in the days leading up to filming.
Jason Scott Lee was originally wanted for the role but he had a three-picture obligation for Universal Pictures and could not commit to the project. Mark Dacascos lobbied for the part and eventually went on to became Christophe Gans' actor of choice for future and upcoming films.