The Hulk's design in this series is based off of the Smart Merged Hulk (who had the strength of the savage Green Hulk, the genius intellect of Bruce Banner, the street smarts of the Gray Hulk) from the 90's comics. However, the Hulk shown here is the well-known low-intellect green Savage Hulk not the Smart Hulk.
In this series, Bruce Banner has blonde hair. In the comics, his hair is brown.
The only piece of Hulk transformation footage not used from the Fantastic Four episode featuring the Hulk, Nightmare in Green (1995), was the scene at the end when the Hulk changes back into Bruce Banner.
Ron Perlman again voices both Bruce Banner and the Hulk just as he did in the Fantastic Four episode featuring the Hulk, Nightmare in Green (1995).
In an online interview, voice director Tom Tataranowicz said, "the casting of the Leader's voice was a satisfying find." Matt Frewer voiced the Leader in this series and would continue to voice him on the UPN The Incredible Hulk (1996) animated series.