Mecha Sonic retexturized sprite sheet by jan300omega on DeviantArt

mecha sonic -my ver- DONE by Joineth on DeviantArt

Dark Sonic Workshop Sprite by RavTheHedgehog on DeviantArt

SGS Silver Sprites by fnafan88888888 on DeviantArt

Super Sonic SGB rescaled sprites by jan300omega on DeviantArt

OMEGA MECHA SONIC SPRITE SHEET by neomar654 on DeviantArt

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They only get bigger by Smite-the-Pangolin on DeviantArt

Metal Sonic sprite by Dandy-ManX on DeviantArt

Bruiticus sprite sheet by JFerral on DeviantArt