Mr. SyS

You're just relaxing and playing Nintendo, but suddenly... You find yourself in the game without even realizing it. You're greeted by Mr. SuS, or Mr. System. He greets you cheerfully:
"Greetings, human! I'll warn you right now: if you've come to defeat me, then... You know it's impossible to defeat the invincible, right? So... I advise you to simply not mess with me."

Mr. SYS was a character featured in a weird Nintendo Australia commercial. In this commercial Mr. Sys was a guy that called all the players to beat Nintendo. Just for the end to say "YOU CANNOT BEAT US". In this commercial other popular Nintendo characters were featured like Duck Hunt and Bowser.
Mr. SYS is a tall polygonal humanoid, all his human parts are all polygonal including his eyes, mouth, and ears. Mr. SYS uses a gray polygonal suit with a red tie on it. Mr. SYS also uses a very long blue pant and dark shoes.
Duck Hunt is a Beagle Dog Breed that at difference to the normal Beagle Dogs, Duck Hunt has a more polygonal appearance mainly presented on his head, besides of his polygonal appearance, Duck Hunt looks almost identical to the Beagle Dog Breed
Bowser's appearance is almost identical to his appearance featured in the first Super Mario Bros game, although of course the biggest differences being that Bowser has a more polygonal appearance and all his yellow parts are changed with a more like white color, except for his hands and legs. Mr. SYS is the monster with most abilities being 10 abilities (9 if you don't count Bowser's repeated WE ARE NINTENDO ability)
When there's one player left during a round with Mr. SYS, the chase theme of the three monsters will be changed with UNBEATABLE (ACT 4)
Mr. SYS would probably try to sue every monster in PC2 with the excuse that they are somehow stealing or copying Nintendo.
Mr. Steal Your Soul is a 3 dimensional human, has brown hair, a light gray suit, red tie, he also has an evil grin.