- For the later robotic version of Knuckles, see Mecha Knuckles.
Metal Knuckles (メタルナックルズ Metarunakkuruzu?) is a robotic version of Knuckles who appeared in Sonic R as an unlockable character. It was created by Dr. Robotnik, and its abilities are similar to Knuckles'.
Sonic Channel featured a Japanese profile of Metal Knuckles. Translated, it states,
"As with Sonic, Eggman prepared this secret weapon for the sake of overthrowing Knuckles, considering his existence to be a hindrance. Having the same power plant as Metal Sonic, speed and acceleration power are high, but like Knuckles, this robot can glide from high places."
Appearance requirements: Collect 5 tokens in Reactive Factory in Grand Prix mode and finish better than fourth place to begin a one-on-one match with Metal Knuckles. Win this race and Metal Knuckles will become a possible choice on the character select screen.
- Low turning ability. To turn without losing control, the player must decelerate.
- Due to inertia, traveling on water is possible. Falling in the water may cause Metal Knuckles to become confused.
- From a high place, aim at a shortcut without pausing.
Appearances in Other Media
Sonic the Comic
In Fleetway's Sonic the Comic, Mecha Knuckles was a new version of the Metallixes loyal only to Robotnik. It made its debut capturing Sonic for the Drakon Empire and then acting as a Prosecutor in Sonic's trial-by-combat. It came very close to killing him, but Tails managed to destroy it by sheer luck. The Metallix was only reused once, as Grimer used it to defeat Sonic so he could discover from him what happened to Robotnik; he then faked things so Sonic wouldn't remember this and instead think he beat Metallix. In its three clashes with Sonic, the Knuckles Metallix has never been defeated. It was once shown that Robotnik had a whole army of them, but they were never shown in use.
|Characters||Sonic (Super Sonic) | Tails | Knuckles | Amy | Dr. Robotnik | Metal Sonic | Tails Doll | EggRobo | Metal Knuckles|
|Courses||Resort Island | Radical City | Regal Ruin | Reactive Factory | Radiant Emerald|
|Objects||Accelerator | Balloon | Chaos Emeralds | Item Panels/Power-Up Items (Fleet Feet, Numbered Item Panel/Numbered Power-Up Item, Lightning Shield, Water Shield) | Ring Gate | Rings | Sonic Token/Sonic Coin | Spring|
|Moves/Techniques||Flying | Gliding | Homing Missile | Spin Dash Roll | Turbo Boost|
|Sonic R||Back in Time | Can You Feel the Sunshine | Diamond in the Sky | Living in the City | Super Sonic Racing | Work It Out | You're My Number One|
|Other||Egg Mobile | Gallery | Loop | Time Attack|