The Emerald Radar in
. Sonic Adventure 2
Emerald Radar is a game mechanic used by Knuckles the Echidna and Rouge the Bat in and its sequel, Sonic Adventure . When using this, the user can locate Sonic Adventure 2 Emerald Shards or other treasures in a level to obtain them in order to complete the said level.
The Emerald Radar appears as three squares each depicted with an Emerald shard (or other treasures depending on the stage) centered in the bottom of the game's HUD. Everytime the player approaches an Emerald Shard, its corresponding Emerald Shard on the Emerald Radar will start glowing at a certain color and a sound will play depending on the range between the user and the Emerald.
Knuckles using the Emerald Radar in
. Sonic Adventure DX: Director's Cut
The Emerald Radar appeared for the first time in
where it was only used by Sonic Adventure Knuckles. The colors of the Emerald Shards in the radar change in accordance to the distance of the shard away from the player's position in the following order of furthest to closest: green, yellow, pink and red. The Radar can also detect multiple shards at the same time and will each have their own.
Sonic Adventure 2
Knuckles using the Emerald Radar in
Wild Canyon, from . Sonic Adventure 2: Battle
The Emerald Shard reappeared in
where it was used by Knuckles and Sonic Adventure 2 Rouge in their levels. In this game though, there are only three colors the Emerald Radar will indicate: (from furthest to closest: green, yellow and red). Unlike its previous appearance, the Emerald Radar only provides an indication for one Emerald Shard at a time.
In the 2P mode of the game,
Tikal and Chaos can also use the Emerald Radar although their radars do not share the same extent of detecting Emerald Shards; Tikal's radar is the weakest one while Chaos's one is the strongest among.
In other media
How do you do that, anyway? Sense the Emeralds and stuff.
I don't know. It's just a sixth sense I've always known. They say the best treasure hunters can "feel" what they're looking for this way.
Charmy, then Knuckles, from . Sonic Universe #64
Knuckles using the Emerald Radar, from
. Sonic Universe #63
The Emerald Radar also appears in the
and its spin-offs published by Sonic the Hedgehog Archie Comics. It is a natural trait of Knuckles, essentially a sixth sense to the echidna which is said that all the best treasure hunters have. It a skill Knuckles gained in the Post-Super Genesis Wave timeline.
Knuckles first used the Emerald Radar to help the
Chaotix find a Chaos Emerald needed to undo the Shattered World Crisis. Using his Emerald Radar, Knuckles and the Chaotix traveled from  Pumpkin Hill Zone to Aquatic Mine Zone to find the nearby Chaos Emerald before the Hooligans did first. Fortunately, Knuckles and the Chaotix had found a Chaos Emerald, but upon receiving it, they found Chip holding onto it.
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Bumper | Bumper Car | Cannon | Conveyor Belt | Crank | Dash Panel | Dash Ring | Drum Can | Explosion Trap | Fan | Flipper | Fountain | Goal Balloon | Hanging Bell | Helicopter | Hint Box | Hint Orb | Icicle | Iron ball | Jump Panel (plate) | Jump Panel (ramp) | Jump Ramp | Laser field | Lit Panel | Mirror | Monkey Detonation Switch | Orca | Power cube | Rocket | Satellite | Slot machine | Spring | Spring Catapult | Switch | Teleporter | Wide spring | Wind Path | Zip Line
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Level Up Items Ancient Light | Crystal Ring | Fighting Gloves | Jet Anklet | Jet Booster | Laser Blaster | Life Belt | Light Speed Shoes | Long Hammer | Lure | Power Rod | Rhythm Badge | Shovel Claw | Warrior Feather
English voice actors
Ryan Drummond ( | Sonic) Corey Bringas ( | Tails) Michael McGaharn ( | Knuckles) Deem Bristow ( | Eggman) Jennifer Douillard ( | Amy) Jon St. John ( | Big) Elara Distler ( | Tikal, Station Square Train Voice, Default Menu Voice) Steve Broadie ( | Gamma, Pachacamac, Mystic Ruins Train Voice) Tomoko Sasaki (
Japanese voice actors
Jun'ichi Kanemaru ( | Sonic) Kazuki Hayashi ( | Tails) Nobutoshi Canna ( | Knuckles) Chikao Ōtsuka ( | Eggman) Taeko Kawata ( | Amy) Shun Yashiro ( | Big) Kaori Asoh ( | Tikal) Jōji Nakata ( | Gamma) Tōru Ōkawa ( | Pachacamac) Kaho Kōda (Station Square Train Voice) | Nobutoshi Canna (Mystic Ruins Train Voice) | Elara Distler (Default Menu Voice) | Tomoko Sasaki (
Believe In Myself | It Doesn't Matter | Lazy Days | My Sweet Passion | Open Your Heart | Unknown from M.E.
Sonic Adventure Original Sound Track (Digi-Log Conversation) | Sonic Adventure Remix | Sonic Adventure: Songs With Attitude Vocal Mini-Album | Sonic Adventure Original Soundtrack 20th Anniversary Edition | Passion & Pride: Anthems with Attitude from the Sonic Adventure Era
777 Slots Pinball | Angel Island | Auto Running | Black Market | Card & Pinball | Chao Adventure^ | Chao Garden ( Station Square Garden, Mystic Ruins Garden, Egg Carrier Island) | Chao Race | Chao Stadium | Chao in Space | Chao Machine | Chao Search* | Corkscrew loop | Debug Mode | E-100 Series | Egg Carrier | Egg Carrier 2 | Emerald Radar | Freeze | Life gauge | Mission Mode | Mystic Ruins | Shrine of Knuckles's race | Shuttle loop | | Sonic Adventure (LCD) Station Square | Station Square Police Department | Tails' Lab | Tornado | Tornado 2 | Transporter Machine
Sonic Adventure DX: Director's Cut ^Exclusive to Dreamcast version of Sonic Adventure
Main article | Scripts ( Hero, Dark, Last) | Staff | Glitches | Beta elements | Gallery | Re-releases ( Battle | 2012)
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Cannon's Core | Green Hill
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Artificial Chaos ( Artificial Chaos P-1, Artificial Chaos P-100, Cell, Float Type, Guard Type) | Boo | Boom Boo
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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 | Propeller Spring | Pulley | Ramp | Rocket | Safe | Spikes | Spinning drum | Swing Bar | Time Stop Switch | Turtle | Warp Hole | Warp Wall | Weight | Wide spring
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 | Point Marker | 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
Angel Island | Auto Running | Black Market | Central City | Chao Adventure 2^ | Chao Garden ( Dark, Hero, Neutral) | Chao in Space | Chao Kindergarten | 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 | Hi-Speed Shoes | 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