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.
The researchers in Shadow the Hedgehog are actually retextured models of GUN soldiers.
A researcher on the right side of
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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Sonic ( Super Sonic) | Tails | Knuckles | Amy* | Shadow ( Super Shadow) | Rouge | Eggman | Big*^ | Tikal* | Chaos* | Dark Chao Walker* | Chao Walker* | Metal Sonic*
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B-3x Hot Shot | Biolizard | Dr. Eggman | Egg Golem | F-6t Big Foot | Finalhazard | King Boom Boo | Knuckles | R-1/A Flying Dog | Rouge | Shadow | Sonic | Tails
Amy Flash* | Black Shield* | Black Wave* | Booming Missile* | Bounce Attack | Captive Light* | Chaos Bind* | Chaos Control | Chaos Impact* | Chaos Screw* | Chaos Spear | Chaos Strike* | Charm Ray* | Crazy Rush* | Crouch | Dark Finish* | Dark Omochao* | Dig | Drill Claw | Drill Drive | Fire Somersault | Glide | Grind Step | Grinding | Hammer Punch* | Heaven's Justice* | Hell Bomber* | Hip Drop* | Hover | Homing Attack | Jump Dash | Kick/Kick Attack | Knuckle Spin* | Laser Missile* | Light Attack | Light Speed Dash | Lock-on | Lock-On Missile | Magic Hands | Omochao | Pick | Power Flash* | Power Laser* | Propeller Punch | Punch (Eggwalker) | Punch/Punch Attack | Rocket Launcher | Rumble Launcher* | Screw Kick | Somersault | Sonic Wind* | Speed Up* | Spin Jump | Spin Dash | Spiral Upper | Storming Heart* | Super Sonic Boost | Swim | Thunder Arrow* | Time Stop* | Volkan Cannon | Wrath of Gaia* | Zap Laser*
Gimmicks and obstacles
Ancient Ruin | Ball Switch | Bungie Vine | Dash Panel | Dynamite | Egg Beetle | Gravity Control Switch | Green energy fluid | Grind Rail | GUN Military Truck | High-speed warp tube | Hint Box | Hourglass | Iron ball | Jump Plate | Laser field | Missile | Pipe | Point Marker | Propeller Spring | Pulley | Ramp | Rocket | Safe | Spikes | Spinning drum | Swing Bar | Time Stop Switch | Turtle | Warp Hole | Warp Wall | Weight | Wide spring
Air Bubble | Balloon | Chao Egg | Chao Key | Chaos Emerald | Chaos Drive | Container ( Cage, Chao Container, Steel Container, Unbreakable Container, Wooden Container) | Emblem | Emerald Shard | Goal Ring | Item Box ( 5 Rings, 10 Rings, 20 Rings, Bomb, Extra Life, Health, High-Speed Shoes, Invincibility, Magnetic Shield, Shield) | Key Stone ( Gate Key) | Meteorite | Outfit | Ring | Snowboard
Level Up Items Air Necklace | Air Shoes | Ancient Light | Bazooka | Booster | Bounce Bracelet | Flame Ring | Hammer Gloves | Iron Boots | Jet Engine | Large Cannon | Laser Blaster | Light Speed Shoes | Magic Gloves | Mystic Melody | Pick Nails | Protective Armor | Shovel Claw | Sunglasses | Treasure Scope
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 (
A Ghost's Pumpkin Soup | Believe In Myself | Deeper | Dive into the Mellow | E.G.G.M.A.N. | Escape from the City | Fly in the Freedom | For True Story | It Doesn't Matter | Kick the Rock! | Live and Learn | My Sweet Passion | Rhythm And Balance | Space Trip Steps | Supporting Me | The Supernatural | Throw It All Away | Unknown from M.E. | Vengeance is Mine
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
2G Hi-Speed Shoes | Angel Island | Auto Running | Black Market | Central City | Chao Adventure 2^ | Chao Garden ( Dark, Hero, Neutral) | Chao in Space | Chao Kindergarten | Chao Lobby | Chao Machine | Chao Race | Chao Stadium | Chao Transporter^ | Chao World | Corkscrew loop | Cyclone | Eclipse Cannon | Eggman Bombom | Eggwalker | Emerald Radar | Fake Emerald | Gerald Robotnik's diary | Health Gauge | Kart Race | Prison Island | Project Shadow | Rank | Shuttle loop | Space Colony ARK | Station Square | Teleporter | Totem pole | Winding Tunnel
*Appears or is playable only in the 2P mode
^Exclusive to Dreamcast version of Sonic Adventure 2
Main article | Scripts ( Main Story, Last Story) | Credits | Glitches | Beta elements | Library Sequences | Gallery
Shadow ( Hero Shadow, Dark Shadow, Super Shadow) | Shadow Android
Black Doom ( Devil Doom) | Dr. Eggman | Sonic | Tails | Knuckles | Amy | Rouge | Omega | Team Chaotix ( Vector, Espio, Charmy) | Cream | Cheese | Maria | Gerald | Commander | President | Researcher | Secretary | Chao
Stages Air Fleet | Black Comet | Central City | Circus Park | Cosmic Fall | Cryptic Castle | Death Ruins | Digital Circuit | Final Haunt | GUN Fortress | Glyphic Canyon | Iron Jungle | Lava Shelter | Lethal Highway | Lost Impact | Mad Matrix | Prison Island | Sky Troops | Space Gadget | The ARK | The Doom | The Last Way | Westopolis
Ark Missile Turret | Artificial Chaos ( Artificial Chaos P-100, Cell) | Black Assassin | Black Hawk | Black Oak | Black Volt | Black Warrior | Black Wing | Black Worm | Big Foot Type A | Big Foot Type B | Death Leech | Death Worm | Egg Bommer | Egg Pawn | Egg Pierrot | Giant Walker | Giga Trooper | Gold Beetle | Gun Beetle | GUN Soldier | GUN Trooper | Jack Bommer | Killer Plant | Mono Beetle | Rocket Beetle | Sand Worm | Shadow Android | Spark Beetle
Black Bull | Black Doom | Blue Falcon | Devil Doom | Diablon | Egg Breaker | Egg Dealer | Heavy Dog
Chaos Blast | Chaos Control | Chaos Spear | Crouch | Dark Spin Dash | Grinding | Grind Step | Homing Attack | Hover | Jump Dash | Light Dash | Mid-Air Attack | Missile Fever | Overturn | Pawn Fever | Pick up | Punch | Ring Fever | Shadow Fever | Slide | Spin Dash | Spin Jump | Strafe | Swift strike | Tail Swipe | Triangle Jump
Air Saucer | Convertible | GUN Motorcycle | GUN Vehicle | HMMWV | Jump Vehicle
Gimmicks and obstacles
Barrier | Black Slab | Case | Cell Cannon | City annihilator bomb | Coaster | Color Panel | Drum | Electrified Rail | Fan | Firewall | Gravity Control Switch | Green energy fluid | Gun Lift | Gun ship | GUN turret | Hint Ring | Jump Panel (Prison Island) | Jump Panel (ramp) | Junction switch | Lantern | Laser field | Laser turret | Light-speed circuit | Meteorite | Pole | Pulley | Red fruit | Red Slime | Rocket | Secret Door | Shield switch | Shooting Gallery | Small bomb | Surveillance camera | Toxic marsh | Toxic river | Vine | Warp Hole | Wide spring
Black Tank | Bomb Unit | Chaos Emerald | Container ( Special Weapon Container, Steel Container, Unbreakable Container, Wooden Container) | Core program | Defense Unit | Egg Balloon | Energy Core | Floating Item Box | Goal Ring | Heal Unit | Item Box ( 1-Up, Barrier, Damage Recover, Heat Barrier, Invincible, Magnetic Barrier, Rings) | President's escape pod | Ring | Secret Key | Temple jewel
Weapons 4-Shot RPG | 8-Shot RPG | Bazooka | Big Worm Shooter | Big Barrel | Black Barrel | Black Sword | Bomb Fever | Egg Bazooka | Egg Gun | Egg Spear | Egg Vacuum | Environment Objects | Flash Shot | Gatling Gun | Grenade Launcher | Heal Cannon | Heavy Machine Gun | Heavy Shot | Laser Rifle | Light Shot | Omochao Gun | Pistol | Refractor | RPG | Samurai Blade | Satellite Gun | Semi-Auto Rifle | Shadow Rifle | Splitter | Sub-Machine Gun | Survival Knife | Tank Cannon | Vacuum Pod | Wide Worm Shooter | Worm Shooter
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 (
" All Hail Shadow" | " Almost Dead" | " E.G.G.M.A.N Doc. Robeatnix Mix" | " I Am... All of Me" | " Never Turn Back" | " The Chosen One" | " Tripod Baby" | " Vengeance is Mine" | " Waking Up" | " Who I Am" (unused)
| Lost and Found: Shadow the Hedgehog Vocal Trax | Shadow the Hedgehog Official Soundtrack
Shadow the Hedgehog Original Soundtrax
Battle Mode | Black Comet | Central Information Agency | Eclipse Cannon | Dark Gauge | Dark Rider | Egg Monitor | Eggman Fleet | Expert Mode | Fire in the Sky Festival | Health Gauge | Hero Gauge | Mother computer | Prison Island | Prosperity ritual | Rank | | Shadow the Hedgehog Flash Space Colony ARK | Tails' Spaceship | White House