Metal Sonic (Custom Boss)

Metal Sonic is now in Sonic 3 A.I.R! He replaces Death Ball in DEZ2, and the arena has changed to match the lack of gravity mechanics. There's no explanation as to how or why he's here, as well as

Jet Metal Sonic SRB2 Message Board

Neo Metal Sonic (Prints and Stickers) Poster for Sale by SammyTighe

Sonic the Fighters Remix: Never Let It Go (Custom Metal Sonic Boss Theme)

Metal sonic, Wiki

Mecha Sonic Customizer [Sonic 3 A.I.R.] [Mods]

Metal Sonic (Custom Boss) Sonic 3 A.I.R Mods • Gameplay

Project M: Metal Sonic (v3.0 LAST?)

My Custom Sprites: Eggman Custom Boss Mobiles by raulhedgebomber on DeviantArt

Metal Sonic - SRB2 Wiki