Mecha Sonic (Super Mario Bros. Z)

Turbo Mecha Sonic (originally known as Metal Sonic and informally known as Mecha Sonic) is a robot created by Dr. Eggman for the sole purpose of destroying Sonic - however, he rebels against his creator and begins searching for the Chaos Emeralds. He served as the primary antagonist for the first saga of Super Mario Bros. Z. Turbo Mecha Sonic was replaced with Metallix in the 2015 remake of Super Mario Bros. Z, as Alvin-Earthworm considered his original design to be underwhelming, he is supposed to be the upgraded form of Metal Sonic, and also because he was easily defeated in his first appearance, Sonic & Knuckles.

Why He Rocks

 * 1) Just like his creator's intentions, he has massively upgraded from his canon counterpart, as now he is more powerful  and assertive than ever.
 * 2) He is the perfect villain. He is ruthless and will stop at nothing to get what he wants.
 * 3) Andrew Chandler's monstrous robot voice portrays him perfectly.
 * 4) It is always fun and overwhelming to see him in battle. Especially when he destroyed the Axem Rangers in Semi-Super form.
 * 5) He is as fast, if not even faster and smarter than Sonic the Hedgehog himself.
 * 6) The main thing that makes him such an intimidating villain is that he is a soulless monster. He would destroy many innocent lives just out of anger and laugh about it. Of course, being an evil robot, he shows no remorse and just carries on completing his mission. He is the darkest villain to come out of any Mario web animation series ever.
 * 7) His dialogue is clever and menacing, especially his catchphrases such as "I'LL CRUSH YOU!".
 * 8) In the reboot, his design was improved.

Bad Qualities

 * 1) Alvin-Earthworm was correct when he felt as though Mecha Sonic's design was underwhelming. Thankfully, he got redesigned.
 * 2) His motives are a little weak.