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Metal Knuckles
From Sonic Retro
- Not to be confused with Mecha Knuckles of Sonic Advance. For the scener, see Metal Knuckles (scener).
Metal Knuckles appeared in Sonic R as a hidden opponent for Reactive Factory. It can be unlocked by getting the five Sonic Tokens of the course, and finish the race on first, second or third place. Once beaten, Metal Knuckles is added to the selection of playable characters. It is Knuckles' robotic counterpart, as Metal Sonic is the robotic counterpart of Sonic. It has an improved gliding ability, compared to Knuckles, and could rivalize with Super Sonic on a race.
| Sonic the Hedgehog series characters | |
|---|---|
| Heroes | Sonic (Super, Hyper, "Dark Super", Darkspine, the Werehog, Excalibur) | Tails (Super) | Knuckles (Super, Hyper) | Amy Rose | Cream | Blaze (Burning) | G.U.N. (Commander) | Emerl | Silver (Super) | Marine | Shade | Knights of the Round Table | Caliburn |
| Anti-heroes/Neutrals | Shadow (Super) | Rouge | Chaotix | Mighty | E-102 Gamma | Chaos | E-123 Omega | Rogues | Merlina |
| Villains | Dr. Eggman/Dr. Ivo Robotnik | Metal Sonic | Iblis | Mephiles | Solaris | Metal Knuckles | E-Series | Biolizard | Black Doom | Gemerl | Fang | Eggman Nega | Ix (Super) | Erazor | King Arthur |
| Other | Gerald & Maria Robotnik | Big | Chao | Tikal | E-101 Beta | Flicky | All Characters |



