19246 - safe, artist:bongwater777, part of a set, knuckles the echidna ( sonic), shadow the hedgehog (sonic), echidna, hedgehog, mammal, monotreme, anthro, sega, sonic boom (series), sonic the hedgehog (series), 2020, cheek fluff

263677 - Related Images - Furbooru

88430 - safe, artist:goblinhordestudios, knuckles the echidna (sonic), badnik, bird, echidna, fictional species, flicky (sonic), mammal, monotreme, robot, anthro, feral, plantigrade anthro, sega, sonic adventure, sonic the hedgehog (series), 2009

188898 - safe, artist:kyutsii_, knuckles the echidna (sonic), echidna, mammal, monotreme, anthro, sega, sonic the hedgehog (series), male, solo, solo male - Furbooru

2203415 - safe, artist:xx-icyhazard-xx, banned from derpibooru, deleted from derpibooru, derpibooru import, rarity, human, snake, amy rose, crossover, sonic the hedgehog (series), wat - Twibooru

Knuckles The Echidna (@SentryOfChaos) / X

Sonic The Hedgehog Boom (1994-2022 RIP) (@spinballer1993) / X

Knuckles The Echidna (@SentryOfChaos) / X

263677 - Related Images - Furbooru

Knuckles The Echidna (@SentryOfChaos) / X

Hedgehogs Can't Swim: Knuckles the Echidna: Issue 24

Sonic The Hedgehog Boom (1994-2022 RIP) (@spinballer1993) / X

56199 - safe, artist:itshelias94, knuckles the echidna (sonic), echidna, mammal, monotreme, anthro, plantigrade anthro, sega, sonic boom (series), sonic the hedgehog (series), 2020, 5 fingers, clothes, male, quills, red tail, shoes, simple