Secret Key is an item that appears in  . It is a key that is used to open Shadow the Hedgehog Secret Doors.
The Secret Key is very similar to the
Special Key from , except it only has one tooth and possesses dark yellow frames.
A Secret Key in
In gameplay, the Secret Keys can open a
Stage's Secret Door. Every Stage has five Special Keys scattered throughout it which are all required to be collected to open its Secret Door. Touching a Special Key makes the player pick it up. It will then automatically be saved in the Game Data, ensuring the player does not have recollect them every time when playing a Stage. When the player brings all five Special Keys to the Secret Door, its locks will break apart one after another and its door will open.
Shadow the Hedgehog (PlayStation 2) European instruction manual, p. 18.
Shadow the Hedgehog
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Shadow ( Hero Shadow, Dark Shadow, Super Shadow) | Black Doom ( Devil Doom) | Eggman | Sonic | Tails | Knuckles | Amy | Rouge | Omega | Vector | Espio | Charmy | Cream | Cheese | Maria | Gerald | Commander | President | Secretary | Chao
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
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
Black Bull | Black Doom | Blue Falcon | Devil Doom | Diablon | Egg Breaker | Egg Dealer | Heavy Dog
Chaos Arrow | Chaos Blast | Chaos Control | Chaos Spear | Crouch | Dark Spin Dash | Grind Step | Homing Attack | Jump Dash | Light Dash | Mid-Air Attack | Missile Fever | Overturn | Pawn Fever | Pick up | Punch | Ring Fever | Shadow Fever | Slide | Spin Dash | Spin Jump | Super Sonic Boost | Swift strike | Tail Swipe | Triangle Jump
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 | Survival Knife | Tank Cannon | Vacuum Pod | Wide Worm Shooter | Worm Shooter
Lost and Found All Hail Shadow | Almost Dead | Chosen One | E.G.G.M.A.N. | I Am... All of Me | Never Turn Back | Tripod Baby | Vengeance is Mine | Waking Up | Who I Am
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 (
Air Saucer | Barrel | Barrier | Black Comet | Black Slab | Black Tank | Bomb Unit | Case | Cell Cannon | Chaos Emerald | Central Information Agency | City annihilator bomb | Color Panel | Container ( Special Weapon Container) | Convertible | Core program | Eclipse Cannon | Dark Gauge | Dark Rider | Defense Unit | Egg Balloon | Egg Monitor | Eggman Fleet | Electrified Rail | Energy Core | Expert Mode | Fan | Fire in the Sky Festival | Firewall | Flash game | Goal Ring | Gravity Control Switch | Green energy fluid | Gun Lift | GUN Motorcycle | Gun ship | GUN turret | GUN Vehicle | Heal Unit | Health Gauge | Hero Gauge | Hint Ring | HMMWV | Item Box ( 1-Up, Damage Recover, Heat Barrier, Invincibility, Super Ring) | Jump Panel | Jump Vehicle | Junction switch | Lantern | Laser Field Block | Laser turret | Light-speed circuit | Magnetic Barrier | Mother computer | Pole | President's escape pod | Prison Island | Prosperity ritual | Red fruit | Red Slime | Ring | Rocket | Secret Door | Secret Key | Shield switch | Shooting Gallery | Small bomb | Surveillance camera | Tails' Spaceship | Temple jewel | Toxic marsh | Vine | Warp Hole | White House | Wide Spring | Yellow water | Zip Line