Metal Sonic has already reached its potential, Mecha Sonic too. Now all that's left is Silver Sonic to shine : r/SonicTheHedgehog

Sonic Battle Royale, Fatal Fiction Fanon Wiki

IdontworkforSEGA — Movie!Sonamy - A quick little thing

sega – Dr. K's Waiting Room

Who would win, Sonic the Hedgehog or Rukia (Bleach)? - Quora

Sonic the Hedgehog – Wizard Dojo

Fanfiction on The-Sonic-Generation - DeviantArt

Most Powerfull Sonic Robot : r/SonicTheHedgehog

sonic the comic – Dr. K's Waiting Room

Will Hyper Sonic be in the new game? - Quora

Sonic the Hedgehog, Sonic Wiki Zone

G1 Death Battle Fan Blogs: Death Battle Predictions: Metal Sonic

Mecha Sonic (Sonic the Hedgehog 2) (8-bit)

Metal Sonic has already reached its potential, Mecha Sonic too

Silver Sonic v2.0, Sonic Wiki Zone