Part 1 - Featuring:

Alter Salvage Sonic ~ -Fear Me!- Sticker
Alter Phantom Classic Sonic ~ -Oh! Very Scary!- Sticker
Alter Silhouette Classic Eggman ~ -Ohoho!- Sticker (Limited time)

A reference to Fierce Forces series, where the Characters later take the Modern appearance (Includes fancomic: "Imagine It!" and fangame: "Hush! & Hustle!"):

Salvage Sonic "Gory-Up!"
Phantasm Modern Sonic "Residue-Up!"
Silhouette Eggman "Alteration-Up!"

Also, who's: Alter Silhouette Classic Eggman.
In Different Dimension, a Spirit of Alter Classic Eggman, that is covered in the cloning material and the one, who possess the body of Alter '27 Golden Sonic.

Overall, this part is related to - FNaS 3: Different Dimension

Hope you enjoy these new stickers. Now I have to go. Cya!