Suggestions by @SpiderSonicPrime

Jim Pirri

as Kraven the Hunter in Happy Birthday, Spider-Man! (Animated Special)

David Kaye

as Mysterio in Happy Birthday, Spider-Man! (Animated Special)

Travis Willingham

as Sandman in Happy Birthday, Spider-Man! (Animated Special)

Richard Epcar

as Sandman in Happy Birthday, Spider-Man! (Animated Special)

Josh Keaton

as Electro in Happy Birthday, Spider-Man! (Animated Special)

Christopher Daniel Barnes

as Electro in Happy Birthday, Spider-Man! (Animated Special)

Dwight Schultz

as Vulture in Happy Birthday, Spider-Man! (Animated Special)

William Salyers

as Doc Ock/Dr. Octopus in Happy Birthday, Spider-Man! (Animated Special)

Jacqueline Pinol

as Rio Morales in Happy Birthday, Spider-Man! (Animated Special)

Russell Richardson

as Jefferson Davis in Happy Birthday, Spider-Man! (Animated Special)

Mary Faber

as Jean DeWolff in Happy Birthday, Spider-Man! (Animated Special)

Tara Platt

as Yuri Watanabe in Happy Birthday, Spider-Man! (Animated Special)

Robert Clotworthy

as George Stacy in Happy Birthday, Spider-Man! (Animated Special)

Matt Lanter

as Flash Thompson in Happy Birthday, Spider-Man! (Animated Special)

Phil LaMarr

as Randy Robertson in Happy Birthday, Spider-Man! (Animated Special)

Ernie Hudson

as Robbie Robertson in Happy Birthday, Spider-Man! (Animated Special)

Grey DeLisle

as Betty Brant in Happy Birthday, Spider-Man! (Animated Special)

Andrew Kishino

as Ned Leeds in Happy Birthday, Spider-Man! (Animated Special)

J.K. Simmons

as J. Jonah Jameson in Happy Birthday, Spider-Man! (Animated Special)

Kath Soucie

as Anna Watson in Happy Birthday, Spider-Man! (Animated Special)