Since Gerald doesn’t create Shadow in the movies, as he’s an alien from another planet like all the anthropomorphic animals are, there was no need to include the Biolizard in Sonic the Hedgehog 3.
Sonic the Hedgehog 3’ introduces Shadow (Keanu Reeves) to the Sonic films, along with Gerald Robotnik, and teases another villain for the future of the franchise.
Sonic Adventure 2 is one of the most quotable games of all ... Sonic's had a bunch of villains, and while Eggman is the antagonist a lot of the time, there are still quite a few unique ones ...
Zavok is a villain who first appeared in Sonic Lost World as one of the Deadly Six. Zavok stands out as a leader because he looks like a more cartoony version of Diablo from that titular series.
Related reads:Sonic the Hedgehog 3 Writers Tell Us About the Film’s Inspirations, Future, and if Chao Are Real This article contains spoilers for the Sonic the Hedgehog film & game franchise.