Tropes in smg4 vs smg3

Continuity Nod: This video references the previous video SSENMODNAR with SMG3 ripping it off with a version of his own.
Evil Doppelgänger: This blooper's main antagonist is a Palette Swapped version of SMG4 who dons black overalls, makes bloopers, and has an evil personality. Yeah, SMG3 definitely qualifies as this and still qualifies as this to this day.
Early-Installment Weirdness: SMG4 had no idea of SMG3's existence until this blooper since he asked Mario who uploaded the video that stole his ideas. This is nowadays a contradiction because it's later revealed that SMG4 and SMG3 did met each other before the events of this episode.
- SMG3's personality is also this. He just wanted to rip off SMG4's bloopers. This is a far cry from his later appearances which involve him either trying to kill SMG4 and his friends, or to just humiliate them.
Establishing Character Moment: The entire blooper is this to SMG3.
Knight of Cerebus: Compared to most "villains" before his debut whom were either just an antagonistic force getting in Mario and SMG4's way like the Weegee Disease, or have a personality similar to a stereotypical Saturday Morning Bad Guy like Bowser, SMG3 is probably the earliest example of a truly evil character in SMG4's Channel despite being also comical.
Retcon: Due to the YouTube and Genesis Arcs, it has been stated that SMG4 and SMG3 knew each other before this episode despite the dialogue saying otherwise.

Recap / SMG4 - SMG4 VS SMG3