Super Best Friends Play Lore
I think I've figured out some super best friends lore, and honestly I think that their lack of acceptance of this hidden lore is what's limiting the channel. First and foremost I'm gonna state that this is pure conjecture based on circumstantial evidence. However I willing to bet nothing on this and shout my opinion into the endless abyss that is the internet!
The biggest piece of hidden lore is that Matt, a.k.a. Matt McMuscles, is a furry. My evidence supporting this is these pointless facts; 1) He likes Aggretsuko. While Aggretsuko is only a level one furry gate way piece of media, I feel it is important to mention this because he was the first one of the group to mention it. 2) He essentially worships Godzilla, which let's be honest is basically a scalie since she's humanoid reptile monster, so I think that's pretty clear. 3) He has gone on record saying that he wants "cat pads" for feet! I don't think I need to explain the ramifications of this, but paws and other unique animal feet are VERY popular for a fair amount of furries/scalies. So with this flimsy evidence I think it's clear that Matt is or is becoming a furry.
Woolie is a boss character. This is perhaps the least shocking one, but I feel it needs to be brought to the awareness regardless. In comparison to Matt and Pat of the super best friends, which are comparable to Ken and Ryu respectively, Woolie actually does things to make himself stronger. He goes Boxing, he does Haka, he diets, and has gone on record saying he would willing sacrifice humanity for double jump powers (not even a triple jump just a double jump). Not to mention while all of us would probably happily become cyborgs, he is VERY enthusiastic about it! Also Woolie has stated multiple times that he thinks the fact that humans and their emotions being driven by chemicals is beautiful, he isn't afraid of ghosts, and he makes videos in which he regularly fight Christian God, I think it's very obvious that woolie is a boss character! He also probably practices every fisticuffs game so he can win!
Lastly but perhaps most importantly, I believe that Pat and Paige are actually Eldritch monstrosities hiding in human form. While I only having behavioral evidence, I still think this is pretty clear. Both of them are walking contraditions, that are clearly not native to this planets customs. They are constantly making new OCD rules and then breaking them at their unknowing convince. They both act completely suprised when something they normally do turns out to be either culturally unacceptable or confusing beyond common sense. And they both have weird eating habits, leading me to believe that their weakness lies in their digestive system. Again purely conjecture but I feel like it is somewhat more believable than to assume that they're humans.
So to reiterate; Matt is or is becoming a furry/scalie. Woolie is a boss character, and probably secretly practices every fighting game so he can beat Matt and Pat. And Pat and Paige are Eldritch Cthulhu monsters kidding in human form. I have very little evidence and it is more than likely circumstantial at best! I am willing to stake nothing on this! And this is literally stuff I thought of will taking a shower today! So clearly this must be the truth of the nature's of their souls!!