All from Spectra/AbbeyFazbear, these are some nicknames she gave me and a few of my friends. Here:

For me, she named:

*Blue Boy (Due to my color)
*Bubbles (Reference to the air bubbles I breathe while underwater)
*Furball (Werehog fluff)
*Fang Face (Due to my fangs)
*Hairball (Again, another werehog reference)
*Aussie Oddball (I'm Australian)
*Blue Bell (Mainly from the flower but the ice cream brand may count)
*Mr. Grumpy Quills (Quills)
*Big Bad Hog (Werehog)
*Quilliam (Quills again)
*Quill-bec (Quebec)
*Mr. Pricklesworth (Her pet hedgehog's name)
*Zinga (Jenga game combined with the sound of "zing" since I run fast)
*Speedy Gonzalez (After the speedy mouse)

Knuckles:

*Red One (Spanish slang and the fact Knuckles is truly red)

Tails:

*Kitsune
*Kitty-Kit
*Twin Tails
*Propeller
*Smarty
*Tech Geek
*Fuzzy Fluff

For the gaia entities:

*Chip the light gaia: Chippy, Chipotle and Chipper.
*Caramel the pure gaia (OC): Cowtail, Candy, Mel-Mel, Cara, Cara-mon (Since Pure Gaia's origin is Jamaica) and Cee-Cee.
*Dark Gaia: Scale Face, Snakeskin, Snake Boy, Snakehead, Shark Bait (Due to its head looking like a hammerhead shark while most names are from his physical appearance--A snake), Slippery Serpent and Dark One (When it possesses her).

Eggman:

*Ro-Fat-Nik
*Robo-Boy
*Eggman (Usual)
*Egg-mon (From Caramel)
*World Masher
*Fatty McFat