Knuckles

Knuckles (also known as Knucklehead, Knux, Knuckle or Mister Guardian) is mobian echidna and one of sonic's rival's and friend's

Biography
Knuckles was born alone and raised on Angel Island[2][3] as the last surviving member of the Knuckles Clan, a long-lost race of echidnas devoted to protecting the Master Emerald from being abused. However, Knuckles' own past was a mystery to him; he knew nothing how he came to be and believed himself to be the last of his kind entirely. The one thing he did know was that he had always been living on his island, protecting the Master Emerald. Knuckles knew from an innate knowledge that his duty was his fate, and he was content with that.

Classic Era

 * Sonic the Hedgehog 3 & Knuckles
 * Sonic the Hedgehog 3
 * Sonic & Knuckles
 * Sonic the Hedgehog Triple Trouble
 * Knuckles' Chaotix
 * Sonic the Fighters
 * Sonic 3D Blast
 * Sonic R
 * Sonic Blast
 * Sonic Mania

Dreamcast Era

 * Sonic Adventure
 * Sonic Shuffle


 * Sonic Adventure 2
 * Sonic Heroes
 * Shadow the Hedgehog

Advance series

 * Sonic Advance


 * Sonic Advance 2


 * Sonic Advance 3

Riders series

 * Sonic Riders


 * Sonic Riders: Zero Gravity


 * Sonic Free Riders

Rivals series

 * Sonic Rivals


 * Sonic Rivals 2

Modern Era

 * Sonic Battle


 * Sonic Rush


 * Sonic the Hedgehog (2006)


 * Sonic Chronicles: The Dark Brotherhood


 * Sonic Colors


 * Sonic Generations


 * Sonic Lost World


 * Sonic Forces

Storybook series

 * Sonic and the Secret Rings


 * Sonic and the Black Knight

Mario & Sonic series

 * Mario & Sonic at the Olympic Games


 * Mario & Sonic at the Olympic Winter Games


 * Sega Superstars Tennis

Super Smash Bros. series

 * Super Smash Bros. Brawl


 * Super Smash Bros. for Nintendo 3DS and Wii U

Sonic & Sega All-Stars Racing series

 * Sonic & Sega All-Stars Racing


 * Sonic & All-Stars Racing Transformed

Other game appearances

 * Sonic the Hedgehog 2
 * Sonic the Hedgehog (1991)