Marks the second time Knuckles shared a voice actor with The Hulk, Travis Willingham being the first.
Despite the fact that they were no humans in the short movie, Maddie, Wade, and Dr. Robotnik were mentioned.
While Ben Schwartz reprised his role as Sonic, Fred Tatasciore and Alicyn Packard replaced Idris Elba and Colleen O'Shaughnessey as the voices of Knuckles and Tails.