Sonic Chaos Tails Sprites (Sonic 2 Palette) by NickyTeam2 on DeviantArt

Mighty and Tiara custom Sonic sprites

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Sonic Mania, T-Posed) - The Models Resource

Sonic & Knuckles Sprite Sheets – Sega Genesis - Sonic Galaxy.net

The Spriters Resource - Full Sheet View - Sonic the Hedgehog Customs - Sonic (Sonic 1 Beta-Style)

PC / Computer - Sonic Mania - Metal Sonic & Silver Sonic - The Spriters Resource

PC / Computer - Sonic Mania - Dr. Robotnik / Eggman - The Spriters Resource

PC / Computer - Sonic Mania - Heavy Rider - The Spriters Resource

PC / Computer - Sonic Mania - Phantom Heavies - The Spriters Resource

PC / Computer - Sonic Mania - Laundro-Mobile - The Spriters Resource

Super Sonic Sprite Sheet by RedDaDoucheHog on DeviantArt