- Universal Pictures
- (present)
- Golar Productions
- (Golar/Lloyd Levin/Dark Horse, producer)
- Dark Horse Entertainment
- (Golar/Lloyd Levin/Dark Horse, producer)
- Image Comics
- Polyphony Digital
- (Man of Action Studios)
- Universal Pictures
- (United States, 1999)(theatrical)
- United International Pictures (UIP)
- (United Kingdom, 1999)(theatrical)
- American Broadcasting Company (ABC)
- (United States, 2002)(original airing, TV)
- CIC Victor
- CIC-Taft Home Video
- (Australia)(VHS)
- O'Connor FX
- (special effects)
- POP Film
- (POP Film & Animation, visual effects)
- Rhythm & Hues Studios
- (visual effects)
- Grant McCune Design
- VisionArt
- (Vision Art, visual effects)
- Dark Horse Entertainment
- (based on the comic book series by)
- Wordsmith Pictures
- (production services)
- American Humane Association
- (animal action monitoring, AHA90611-1)
- BT Industrial Supply
- (expendables)
- Cenex Casting
- (extras casting)
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