in comments (made this based off a theme someone made for Super Metal in OM)

Super Metal Sonic would be a glass-cannon juggernaut fueled pure chaos energy and even purer hatred. The chaos energy clashes with his own body, making him the most vulnerable Juggernaut, but also makes his abilities the most chaotic and brutal.

In my take on Juggernaut mode, all exes are given HP and a skilled Juggernaut should be able to kill all the exes if they play smart. An exit still opens for them to escape if they want to, but if they kill all exes they get a 2x bonus and a different victory screen.

Stats:
HP: 400
Speed: Equal to fast killers
Resistance: 30%
M1 Damage: 30

Passives:

Unstable Energy
When Metal Sonic gets hit, the executioner who landed it is zapped by Chaos Energy, stunned for 3 seconds and is applied with the burning debuff for 6 seconds.

Undying Hatred
When Metal Sonic hits 50 HP or lower, he releases a shockwave that deals 80 damage and a 6 second stun to any executioner in a large radius.

Overdrive
When Undying Hatred is activated, Metal Sonic's resistance is buffed to 75%, all his abilities deal 35 more damage, his m1 deals 20 more damage, all stuns are 2 seconds longer, and his speed is buffed to be faster than almost all killers.

Abilities:

M1
Like other juggernauts, Super Metal Sonic has an m1. However, his behaves differently than others. Metal does a roundhouse kick forward, stunning exes hit by the kick for 3 seconds, and if m1 connects, exes in a small radius will be shocked by electricity stemming out of the killer hit, stunning for 2 seconds. The kick deals 30 damage, and the electricity deals 20. This has a cooldown of 8 seconds.

Chaotic Charge
Metal Sonic winds up for 2 seconds before bursting forwards in the direction Metal Sonic is facing. This move works like 2011x's charge, where Metal can fly in any direction he is facing. This move moves much faster than destructive charge and deals no self damage. This move grabs the first exe it connects with, dealing 5 damage every second, and then deals 10 damage and a 2 second stun to any exe in the path of Metal. If Metal slams the exe, it deals 50 damage and a 7 second stun, and sends out a small shockwave that stuns exes for 2 seconds (deals no damage). If the move ends naturally after its 10 second duration, Metal tosses the exe behind him, leaving them stunned for another 5 seconds. This move also has the unstoppable effect for exes hit by Metal barreling through with an exe already in tow. This move has a 28 second cooldown

There's more below

Chaotic Restoration
Metal Sonic slows down to average killer speed, and a loud charging sound plays as Metal flashes to indicate the moves occurrence. During this state, he can m1 but cannot use other abilities. After charging up for 5 seconds, Metal heals 50 HP. If Metal is hit during the charge, he loses damage resistance for that hit and the move is canceled. If canceled, the move is put on a 18 second cooldown. If the heal is successful, the move is put on a 26 second cooldown.

Chaotic Parry
Metal Sonic slows down to average killer speed and his golden aura flares up brightly. If an attack connects with him in this state, he will deflect it, dealing the original damage to the exe who used it, + 20 extra damage. If the attack was an m1, Metal will grab the exe and stomp them into the ground, creating a small shockwave that deals 10 damage and a 2 second stun.

Metal's Victory Screen:

Super Metal Sonic crackles with electricity as he chokes 2011x, he is shown to be surrounded with dead executioners, before snapping X's neck, tossing him to ground behind him, before turning to the screen and mimicking His victory screen somewhat as he rests his foot on X's body.