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

VS mecha knuckles by Shinychariot05 on Newgrounds

Sonic Shorts, Tropedia

Knuckles vs Mecha Sonic MK 2 by GardePickle on DeviantArt

Metropolis Mayhem

Knuckles vs Mecha Sonic

Sonic vs Knuckles by ShiraCartoonz on Newgrounds

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

Sonic vs Knuckles

Knuckles Needs Knuckles' Power - Movie Knuckles Vs. Game Knuckles