19978 - safe, artist:bongwater777, knuckles the echidna (sonic), shadow the hedgehog (sonic), echidna, hedgehog, mammal, monotreme, anthro, sega, sonic the hedgehog (series), 2020, black fur, black tail, blushing, chaos emerald, cheek fluff

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176158 - safe, artist:tighesammy, knuckles the echidna (sonic), sonic the hedgehog (sonic), anthro, sega, sonic the hedgehog (series), duo, duo male, male, males only, sonic the hedgehog 3, super sonic - Furbooru

259575 - safe, artist:claudeartz, knuckles the echidna (sonic), anthro, sega, sonic prime, sonic the hedgehog (series), knuckles the dread (sonic prime), male, solo, solo male - Furbooru

#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 background

188897 - safe, artist:koafreedraw, knuckles the echidna (sonic), rouge the bat (sonic), bat, echidna, mammal, monotreme, anthro, sega, sonic the hedgehog (series), sonic the hedgehog ova, crossover, duo, female, male - Furbooru

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