- Gabriella Lewis
- Â Additional Voices 78 episodes, 2003-2005
- Jun'ichi Kanemaru
- Â Sonic the Hedgehog 76 episodes, 2003-2005
- Sanae Kobayashi
- Â Chris Thorndyke / ... 76 episodes, 2003-2005
- Jason Griffith
- Â Sonic the Hedgehog / ... 76 episodes, 2003-2005
- Suzanne Goldish
- Â Christopher 'Chris' Thorndyke 76 episodes, 2003-2005
- Ryô Hirohashi
- Â Miles 'Tails' Prower / ... 75 episodes, 2003-2005
- Lisa Ortiz
- Â Amy Rose / ... 75 episodes, 2003-2005
- Taeko Kawata
- Â Amy Rose 73 episodes, 2003-2005
- Amy Palant
- Â Miles 'Tails' Prower 73 episodes, 2003-2005
- Rebecca Honig
- Â Cheese / ... 72 episodes, 2003-2005
- Bin Shimada
- Â Bocoe / ... 71 episodes, 2003-2005
- Mike Pollock
- Â Dr. Eggman / ... 71 episodes, 2003-2005
- Darren Dunstan
- Â Bocoe / ... 70 episodes, 2003-2005
- Andrew Rannells
- Â Decoe / ... 70 episodes, 2003-2005
- Sayaka Aoki
- Â Cream the Rabbit / ... 69 episodes, 2003-2005
- Chikao Ôtsuka
- Â Dr. Eggman / ... 67 episodes, 2003-2005
- Ken Yamaguchi
- Â Decoe / ... 67 episodes, 2003-2005
- Dan Green
- Â Knuckles the Echidna / ... 64 episodes, 2003-2005
- Nobutoshi Canna
- Â Knuckles the Echidna 55 episodes, 2003-2005
- T.R. Shields III
- Â Chuck Thorndyke 49 episodes, 2003-2005
- Amy Birnbaum
- Â Cosmo / ... 47 episodes, 2003-2005
- Kathleen Delaney
- Â Rouge the Bat 45 episodes, 2003-2005
- Yumiko Kobayashi
- Â Bokkun 45 episodes, 2003-2005
- Naoki Imamura
- Â Mr. Tanaka / ... 44 episodes, 2003-2005
- Rumi Ochiai
- Â Rouge the Bat 43 episodes, 2003-2005
- Ted Lewis
- Â President / ... 43 episodes, 2003-2005
- Yuka Shioyama
- Â Scarlet Garcia / ... 37 episodes, 2003-2005
- Kujira
- Â Ella 34 episodes, 2003-2005
- Megan Hollingshead
- Â Scarlet Garcia / ... 34 episodes, 2003-2004
- Tomohisa Asô
- Â President / ... 32 episodes, 2003-2004
- Gregory Abbey
- Â Sam Speed / ... 30 episodes, 2003-2005
- Naomi Shindô
- Â Danny / ... 27 episodes, 2003-2005
- Kerry Williams
- Â Frances / ... 26 episodes, 2003-2005
- Etsuko Kozakura
- Â Cosmo 25 episodes, 2005
- Michio Nakao
- Â Mr. Stewart / ... 24 episodes, 2003-2004
- Yukari Hikida
- Â Topaz / ... 20 episodes, 2003-2004
- Oliver Wyman
- Â Big the Cat / ... 19 episodes, 2003-2005
- Kôji Yusa
- Â Shadow the Hedgehog 19 episodes, 2003-2005
- Rachael Lillis
- Â Danny / ... 19 episodes, 2003-2004
- Jennifer C. Johnson
- Â Topaz 18 episodes, 2003-2004
- James Carter Cathcart
- Â Vector the Crocodile / ... 17 episodes, 2003-2005
- Souichirou Tanaka
- Â Sam Speed / ... 16 episodes, 2003-2004
- Kôji Haramaki
- Â Jerome Wise / ... 16 episodes, 2003-2004
- Matt Hoverman
- Â Dark Oak / ... 15 episodes, 2003-2005
- Noriko Hidaka
- Â Helen 13 episodes, 2003-2005
- Jôji Nakata
- Â Dark Oak 13 episodes, 2005
- Christopher Collet
- Â Squad Commander / ... 12 episodes, 2003-2004
- David Lapkin
- Â Jerome Wise 12 episodes, 2003-2004
- Kumiko Izumi
- Â Christina Cooper / ... 12 episodes, 2003-2004
- David Wills
- Â Espio the Chameleon / ... 12 episodes, 2003-2005
- Hiroomi Sugino
- Â Chairman of the Joint Chiefs of Staff / ... 11 episodes, 2003-2004
- Madeleine Blaustein
- Â Police Officer / ... 10 episodes, 2003
- Nell Balaban
- Â Additional Voices / ... 11 episodes, 2003
- Jim Napolitano
- Â Additional Voices 9 episodes, 2003
- Kayzie Rogers
- Â Additional Voices / ... 9 episodes, 2003
- Takashi Nagasako
- Â Big the Cat 8 episodes, 2003-2004
- Kenta Miyake
- Â Vector the Crocodile 8 episodes, 2003-2005
- Yuuki Masuda
- Â Espio the Chameleon 8 episodes, 2003-2005
- Youko Teppozuka
- Â Charmy Bee 8 episodes, 2003-2005
- Jûrôta Kosugi
- Â Pale Bayleaf 8 episodes, 2005
- Ken Narita
- Â Black Narcissus 8 episodes, 2005
- Marc Diraison
- Â Pale Bayleaf / ... 8 episodes, 2005
- Kaori Asô
- Â Tikal 7 episodes, 2003
- Kazunari Tanaka
- Â Cowboy / ... 7 episodes, 2003-2004
- Takeshi Watabe
- Â Yellow Zelkova 6 episodes, 2005
- Masakazu Morita
- Â Chris Thorndyke (Adult) / ... 5 episodes, 2004-2005
- Erica Schroeder
- Â Galaxina / ... 4 episodes, 2003-2005
- Takehiko Watanabe
- Â Flying Dog / ... 4 episodes, 2003
- Yuri Shiratori
- Â Maria Robotnik 4 episodes, 2003
- Yasuhiko Tokuyama
- Â Principal / ... 4 episodes, 2003
- Toshihiko Nakajima
- Â Pachacamac / ... 4 episodes, 2003
- Eric Stuart
- Â Newscaster / ... 3 episodes, 2003-2004
- Hiroaki Miura
- Â Additional Voices 3 episodes, 2003
- Carrie Keranen
- Â Earthia 1 episode, 2005
- Hiroshi Okamoto
- Â Caster / ... 2 episodes, 2003-2004
- Takeharu Ãnishi
- Â Hawk 2 episodes, 2003-2004
- Kenji Sahara
- Â Dr. Atsumi 2 episodes, 2004
- Takahiro Yoshimizu
- Â Police / ... 2 episodes, 2003
- Kozue Kamada
- Â Boom 2 / ... 2 episodes, 2003
- Kiyotaka Furushima
- Â Ken Morley 2 episodes, 2004
- Richard Hoefer
- Â Mr. Schmitz 2 episodes, 2003
- Katsuyuki Konishi
- Â Lucas 2 episodes, 2005
- Yûsuke Numata
- Â Police Officer 1 episode, 2003
- Hiroyuki Satô
- Â Travis 1 episode, 2003
- Hiroshi Kamiya
- Â S Team 1 episode, 2003
- Kôzô Shioya
- Â Mark 1 episode, 2003
- Ryôhei Nakao
- Â Announcer 1 episode, 2003
- Saori Sugimoto
- Â Boom 1 1 episode, 2003
- Ikuko Tatsu
- Â Julia 1 episode, 2003
- Takuo Kawamura
- Â Gramps A 1 episode, 2003
- Takayuki Sasada
- Â Beach Man 1 episode, 2003
- Mahito Funaki
- Â Gramps B 1 episode, 2003
- Yuka Takamatsu
- Â Mother A 1 episode, 2003
- Kimiko Saitô
- Â Granny A 1 episode, 2003
- Masumi Kageyama
- Â Miranda Curtis 1 episode, 2004
- Yasuhiko Kawazu
- Â Mr. Smith 1 episode, 2003
- Yû Sugimoto
- Â Prof. Chaco Bankissy 1 episode, 2004
- Hôchû Ôtsuka
- Â Red Pine 1 episode, 2005
- Veronica Taylor
- Â Lindsey Thorndyke 1 episode, 2003
- Jerry Lobozzo
- Â S Team 1 episode, 2003
- Marc Thompson
- Â Metarex Viper 1 episode, 2005
- Norio Wakamoto
- Â Metarex Deserd 1 episode, 2005
- Michael Sinterniklaas
- Â Chris Thorndyke (Adult) (uncredited) 3 episodes, 2004-2005
- Tom Souhrada
- Â Commander Passer (uncredited) 1 episode, 2004
- Priscilla Everett
- Â Suzy (uncredited) 1 episode, 2004