On Valentine's Day of 2018, the official Sonic the Hedgehog social media accounts uploaded a card featuring the infamous internet meme Sanic.

Sonic Speed Battle has alternate outfits for the Babylon Tropical Storm, Tidal Wave, and Ice Slicer Jet.Jet is the only one who's name isn't a pun, he's also dressed in a completely different outfit too.

In the trailer of Sonic Racing Crossworlds, Shadow is in what can be assumed to be a personal parking garage, however Jet the Hawk's Type-J Extreme Gear can be seen hung up.This might imply that Shadow robbed Jet.

In the Sonic the Hedgehog and Mega Man crossover Worlds Collide, Drs. Eggman and Wily create the Chaos Devil, the fusion of Chaos and the Yellow Devil.

What is your crackhead Sonic theory that you absolutely CANNOT let go of?This isn't a place for "Shadow is based on the Hidden Palace mural", I want to hear theories and headcanons I have never heard before!

Silver's emoji in the SEGA Forever Discord server is inspired by the famous Pizzakinesis meme.

Cream the Rabbit and Cheese the Chao are named after, well...cream cheese.

Rouge the Bat's Valentine outfit from Sonic Speed Battle has Chroma alts based on Greek Goddesses.Aphrodite Sapphire is named after the goddess of (sexual) love, beauty and fertility.Persephone Violet is named after the Queen of the Underworld and goddess of grain.

SQUAAAAAAAAD

In Archie's Sonic the Hedgehog #149 a collection of several multiversal counterparts of Tails appear, including but not limited to a clown one, a Care Bear parody, Darth Maul, and a pregnant Tails.

The year 2006 is the only instance where Sonic acquires two prominent rival characters, going from a skateboarding hawk to a psychokinetic hedgehog.

Concept art of the Black Dragon from Sonic Superstars suggests it was going to appear in a quadruped form, much like Trip's dragon form, unlike the bipedal appearance it takes on in it's respective boss fight.

A new year means new Sonic content! What are you most looking forward to, and what are you hoping to see be revealed in the year?

In 2020, the Sonic the Hedgehog social media accounts uploaded a piece of celebratory artwork for the new year, inspired by Sonic 2's special stage, where Tails is running directly into bombs.Foreshadowing is a literary device that hints at future events in a story.

HAPPY (early) ANNIVERSARY TO THAT TIME METAL SONIC LOCKED THE FUCK IN I DONT KNOW WHY HE GOT A SUDDEN RESURGENCE IN THE LATE 2010S TO NOW BUT I HOPE IT KEEPS GOING GRAAAAAAGH

Guys this is important which Sonic robots are you having sex with

In Antonblast, one of Annie's many poses when jumping between the foreground and background is the famous Sonic Adventure pose.

In IDW's Sonic the Hedgehog #54, Cubot is shown to have a Cyber Singer Mika figurine.Mika is a combination of Sonic's initial rabbit concept design (often dubbed either Feels or Max by fans) and Hatsune Miku.

In the game Antonblast, Anton and Annie have skins directly based on Shadow the Hedgehog and Rouge the Bat, with their descriptions based on quotes from them.

According to the official Summitsphere Twitter account, Antonblast's Dynamite Anton is the canonical father of Amy Rose.This is further clarified in the game's "Life with Anton" commercial.

In Skullgirls 2nd Encore, when Fukua is trapped in a bubble by Umbrella, she can be seen striking a pose that is clearly inspired by Shadow the Hedgehog's key art in Sonic Adventure 2.She also seems to hold a different food item randomly.

In IDW's Sonic 30th Anniversary Special, Nite the Owl was going to appear with a unique classic era design; however, due to time concerns regarding approval from Sega, he appeared with his normal, modern look.

While the name "Mecha Sonic" is typically affiliated with the robot duplicate from Sonic 3 & Knuckles, the name is used in Archie to refer to Sonic when he is roboticized. This version of "Mecha Sonic" has appeared several times throughout the comic's run.

Up until the last few years, Sonic the Hedgehog has just been rocking the same vampire costumes all his life for almost every Halloween.