Pixilart - sonic sprites by Charlesmario

Collabs - Pixel Art Gallery - Pixilart

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Super Mario Maker-Style) - The Spriters Resource

Sonic - Sonic Mania Palette - Pixilart

Sonic characters sprites use for MSRWBY by SuperRetroClassic81 on DeviantArt

Collabs - Pixel Art Gallery - Pixilart

Sonic RPG Maker 2000 and 2003 charset sprites 9 by Ocamaru on DeviantArt

Pixilart - Sonic hanging sprite by Sonicyx99

Ralorche — Some more Saturn-esque Sonic sprites.

Pixilart - Sonic Falling sprite by Sonicyx99

Sonic RPG Maker 2000 and 2003 charset sprites 4 by Ocamaru on DeviantArt

Pixilart - Super Sonic Mania/+ by Sonic-Style