A researcher on the right side of
researchers are characters that appear in the  . There are scientists who resided on the Sonic the Hedgehog series Space Colony ARK over fifty years ago.
The researchers wear white shirts and trousers with an orange wastecoats with black stripes on the shoulders. They also wear white helmets with visors. They also wear white gloves and shoes.
Sonic Adventure 2
The researchers were indirectly mentioned in
and its remake Sonic Adventure 2 . In this game, it is mentioned that they worked alongside Sonic Adventure 2: Battle Professor Gerald Robotnik on Project Shadow onboard the Space Colony ARK. When the ARK was shut down and have its protects ceased, GUN executed everyone on the ARK including the researchers. 
Shadow the Hedgehog
, the researchers appear in Shadow the Hedgehog The Doom as the objective for the Hero mission. Ten injured researchers are found throughout the stage and Shadow must use Heal Units (or the Heal Cannon if unlocked and found) to revive them.
Powers and abilities
Being involved in the research projects conducted by
Gerald Robotnik, it stands to reason that the researchers possess a great deal of knowledge in the fields of science.
Sonic Team (18 November 2005). Shadow the Hedgehog. PlayStation 2. Sega. Area/level: The Doom. " Maria Robotnik: The researcher has been saved as well! Let's keep going!"
↑ Enterbrain (10 October 2001).
"５０年前の真実". ソニックアドベンチャー2パーフェクトガイド (in Japanese). ISBN 978-4757706255. Retrieved 8 August 2017. ↑
Sonic Team (11 February 2002). Sonic Adventure 2: Battle. GameCube. Sega. Area/Level: Last Story. " Rouge/Gerald: I don't quite know what happened, or what went wrong. Was it a mistake to create the Ultimate Life Form? I thought it would be something that would benefit mankind... But then the military guards landed on the Colony that day. They were sent to destroy the research project that I had been working on. My colleagues at the research facility, my granddaughter Maria, I hope you are all safe."
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English voice actors
Ryan Drummond ( | Sonic) Connor Bringas ( | Tails) Scott Dreier ( | Knuckles/ GUN Soldiers) Jennifer Douillard ( | Amy Rose) David Humphrey ( | Shadow the Hedgehog) Lani Minella ( | Rouge/ Omochao) Deem Bristow ( | Doctor Eggman) Moriah Angeline ( | Maria Robotnik) Marc Biagi ( | Gerald/ GUN Soldiers) Steve Broadie ( | President) Shelly Fox (Default menu voice) | Jon St. John ( | Big) Elara Distler ( | Tikal) Tomoko Sasaki (
Japanese voice actors
Jun'ichi Kanemaru ( | Sonic) Kazuki Hayashi ( | Tails) Nobutoshi Canna ( | Knuckles) Taeko Kawata ( | Amy) Kōji Yusa ( | Shadow) Rumi Ochiai ( | Rouge) Chikao Ōtsuka ( | Eggman ) Etsuko Kozakura ( | Omochao) Yuri Shiratori ( | Maria) Kinryū Arimoto ( | President) Shun Yashiro ( | Big) Shelly Fox (Default menu voice) | Tomoko Sasaki (
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Multi-Dimensional Sonic Adventure 2 Original Sound Track | Sonic Adventure 2 Vocal Collection: Cuts Unleashed | Sonic Adventure 2 Official Soundtrack | Sonic Adventure 2 Battle - Sampler | Sonic Adventure 2 Original Soundtrack 20th Anniversary Edition | Passion & Pride: Anthems with Attitude from the Sonic Adventure Era
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*Appears or is playable only in the 2P mode
^ Dreamcast version of Sonic Adventure 2 only
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English voice actors
Jason Griffith ( | Sonic, Shadow) Sean Schemmel ( | Black Doom) Mike Pollock ( | Eggman, Gerald) Amy Palant ( | Tails) Dan Green ( | Knuckles) Lisa Ortiz ( | Amy) Kathleen Delaney ( | Rouge) Rebecca Honig ( | Cream, Maria) Carter Cathcart ( | Vector) David Wills ( | Espio) Amy Birnbaum ( | Charmy) Jeff Kramer ( | Omega) Andrew Rannells ( | GUN Soldier) Marc Thompson ( | Commander) Maddie Blaustein ( | President) Bella Hudson (
Japanese voice actors
Kōji Yusa ( | Shadow) Jun'ichi Kanemaru ( | Sonic) Ryūzaburō Ōtomo ( | Black Doom) Chikao Ōtsuka ( | Eggman, Gerald) Ryō Hirohashi ( | Tails) Nobutoshi Canna ( | Knuckles) Taeko Kawata ( | Amy) Rumi Ochiai ( | Rouge) Sayaka Aoki ( | Cream) Yuri Shiratori ( | Maria) Kenta Miyake ( | Vector) Yūki Masuda ( | Espio) Yōko Teppōzuka ( | Charmy) Taiten Kusunoki ( | Omega) Takashi Yoshida ( | GUN Soldier) Banjō Ginga ( | Commander) Yutaka Nakano ( | President) Junko Kitanishi ( | Secretary) Ryō Hirohashi (
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