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

Another returning move For Amy Rose Amy Flash.

Akin to MUGENhunter's Tails

The "Big Green Man" (Guest) teaser.

I'm taking you down like its 1998/1999!

Early previews of "Shining Wine (Not alcohol)" and "Castle Party"

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

That Hover Move.

It's like the OG game but less stiff.

(Not finalized yet but its a resemblance.) I have decided to make it 3 Buttoned. Though the Basic attacks mapped A,B and C buttons will also be mapped to X,Y and Z

(Advance 1) Angel Island Zone.

Originally for Infinite Battle Now retooled