5:4
anthro
bulge
digital_media_(artwork)
echidna
flexing
hi_res
k_tepes
knuckles_the_echidna
male
mammal
monotreme
muscular
muscular_anthro
muscular_male
pecs
red_body
ribbon_only
ribbons
sega
simple_background
smile
solo
sonic_the_hedgehog_(series)
tail
