This speedy killing machine stands to this day as Dr. Eggman's proudest acheivement & the closest he's ever gotten to killing Sonic. Using traces of Sonic's DNA & countless calculations on the Blue Blur's speed, Metal Sonic was built to not only keep up with Sonic, but potentially surpass him using the power of soulless technology. However, no Metal Sonic model has ever reached such perfection just yet, & when given too much of Sonic's likeness & personality, Metal Sonic has even made attempts to overthrow his master & take the destruction of the planet into his own hands.
When given Sonic's unwavering ego, Metal Sonic actually deludes himself into thinking that HE'S the real Sonic, & does everything he can to prove it, even to his detriment. Metal's fighting style is ruthless, using his environment & programmed abilities to near-peak precision. Nothing is off limits for this hunk of metal, & that's what makes him one of the mad doctor's deadliest.