Custom / Edited - Sonic the Hedgehog Customs - Shadow - The Spriters Resource

Custom / Edited - Sonic the Hedgehog Customs - Shadow - The #1 source for video game sprites on the internet!

Sonic Heroes No Hud - Colaboratory

Custom / Edited - Sonic the Hedgehog Customs - Sonic Battle Prototype Sprite Recreation - The Spriters Resource

Sonic The Hedgehog Custom Sprites : Modgen : Free Download, Borrow, and Streaming : Internet Archive

Custom / Edited - Sonic the Hedgehog Customs - Shadow (Sonic Pocket Adventure-Style) - The Spriters Resource

Custom / Edited - Sonic the Hedgehog Customs - Super Sonic (Sonic 3-Style) - The Spriters Resource

Mobile - Sonic Forces: Speed Battle - Shadow - The Models Resource

The VG Resource - Dolphman's sprite library of customs & edits

Macholor

Custom / Edited - Sonic the Hedgehog Customs - Shadow (NES-Style) - The Spriters Resource

Metal Sonic Rebooted - Metal Sonic sprite sheet by LoraTWolf46 on DeviantArt