Knuckles vs Mecha Sonic by thewax70 on Newgrounds

I was bored one day so I quickly did this. Its the final battle in Sonic & Knuckles when you play as Knuckles. Mecha Sonic opens his chest plate and absorbs the the Master Emerald

Sonic Shorts (Web Animation) - TV Tropes

Full Metal Sonic by TheWax on DeviantArt

Sonic VS Mecha Sonic

Full Metal Sonic

Knuckles VS Mecha Sonic by Kyrolyx -- Fur Affinity [dot] net

Knuckles Vs Mecha Sonic by Ravrous on DeviantArt

Sonic: Dark Chaos PT1

Sonic The Hedgeblog — Mecha Knuckles king-hits Mecha Sonic, from the

Knuckles v. Mecha Sonic by CIWT on Newgrounds