surprising how i manage to draw King K. Rool accurately like that for the first time

2/3 of them are references to

Sonic's Concept and is also a Skin in Sonic Superstars Cream's Debut (Though inconsistent looks)

A former 90s rival's (A red capped plumber guy) recent 3D platformer since 2017

(coming some time soon or something.) The 1st Sonic Battle Redux arcade Run: Sonic.

Every Continue and Confirming

As of 6/26/2022

A returning move from Infinite Battle

but a bit more on Sonic 06's Green Gem.

Another mechanic that I coded for the first time

"Grab Canceling"

The only thing that varies between character is: how long will they actually throw the opponent while Pressing Y + Holding FWD/Pressing Z + Holding Backwards will still do the cancel trick

The "Big Green Man" (Guest) teaser.

Act Music as Rounds? (may not apply to every stage)

Basically

Valgallah's Cream's "Chao Force" Super

Command is

D,DF,F X+Y

Yoshi and Birdo cosplaying as Ichigo Momomiya