Knuckles

Idris Elba

Knuckles the Echidna (voice)

Adam Pally

Wade Whipple

Stockard Channing

Wendy Whipple

Kid Cudi

Agent Mason / Mason

Ellie Taylor

Agent Willoughby / Willoughby

Alice Tregonning

Susie Barnes

Jaimi Barbakoff

Susie's Mom

Fergus Craig

Susie's Dad

Edi Patterson

Wanda Whipple

Rory McCann

The Buyer

Julian Barratt

Jack Sinclair

Christopher Lloyd

Chief Pachacamac (voice)

Cary Elwes

'Pistol' Pete Whipple

Paul Scheer

Gary Saint Claire III Esq.

Rob Huebel

Dylan Beagleton

Owen Warren

Pete's Bowling Partner

Colleen O'Shaughnessey

Miles 'Tails' Prower (voice)

Ben Schwartz

Sonic the Hedgehog (voice)

Tika Sumpter

Maddie Wachowski

Anaya Barnes

Susie's Bowling Partner

Tony Coughlan

Welder Worker

Graeme Thomas King

Agent Fairley

Robin March

Random Bowler

Brian Yansen

Mailperson

Ben Prout

Store Clerk

Jorma Taccone

Radio Host Reader (voice)

JJ Battell

Chain Bounty Hunter

Darcy Castle

Young Wanda

Kit Rakusen

Young Wade

Daniel Singh

Cattleprod Bounty Hunter

Andy Heath

Knuckles' Dad (voice)

Adam Kerr

Greasy Faced Kid

Anna Carina

Autograph Seeker 2

Maxveal McLaren

Craps Dealer

Lesley Molony

Roulette Dealer

Ben Pugh-Cook

Autograph Seeker 1

Douglas Utting

Red Mascot

Charlotte Workman

Casino Waitress

Jasmine Chiu

Cocktail Waitress

Paul Low-Hang

Blue Mascot

Michael Bolton

Wade Whipple's Singing Voice (voice) (uncredited)

Jim Carrey

Dr. Robotnik (archive footage) (uncredited)

James Marsden

Tom Wachowski (archive footage) (uncredited)