Sonic and his friends find themselves grappling with the challenges of adulthood. With Dr. Eggman's threats diminishing, Sonic searches for a new purpose amidst the burden of always being the world's saviour. Tails, now Dr. Prower, gains commodity as a community doctor, all while delving into life creation experiments, aiding Knuckles and Rouge in conceiving the first ever interspecies mobian. Shadow, in his quest to further explore his purpose as The Ultimate Lifeform, seeks Tail's assistance in harnessing his DNA, to cure all disease, starting with NIDS. Amy, feeling the pressure of time, ends her relationship with Sonic, despite their mutual feelings for one another, as he's simply not ready to settle down and commit. Following Rouge's suggestion, Amy turns to Tails for help with her fertility concerns, however, an unexpected incident alters her plans, leading to the emergence of a groundbreaking discovery. This is The New Wave Ultimate Lifeform.

~I am the tallest of mountains I am the roughest of waves I am the toughest of terrors I am the darkest of days but for you... I am the most beautiful of mountains I am the soothing of waves I am the master of pleasures I am the brightest of days~ Infinite the Jackal is a mercinary working for the evil genius master mind, Dr. Ivo Robotnik. Who had recently been defeated against Sonic and his crew. As well as the resistance's new rookie, (Y/n). After this however, Sonic and his original crew were insulting the jackal. (Y/n) didn't like this because of her extreme kindness and small crush on the scary Jackal. She stood up for him and in the end she quit the resistance. Causing Sonic to go into a regrettful frenzy and even asked for Eggman to help get her back. In the meantime, (Y/n) was making friends with the Jackal herself.

Y/N the sister of Sonic was suddenly teleported into another dimension where there's war and chaos in Mobius ruled by Eggman. She heard that Sonic was defeated. How is this possible?! She even encountered the anthropomorphic jackal with black fur named Infinite. Infinite aided Eggman by helping him expand the Eggman Empire to its largest size to date after defeating Sonic the Hedgehog. Luckily, there's hope where she meets the Resistance with Knuckles and others here to fight back against Eggman and his army. What will she do? Will she ever go back home?

The continuation of my Sonic X MHA crossover story. If you haven't read any of the previous volumes, I highly suggest reading the first 5 before hopping into this next addition. After defeating Metallix on Nabu Island, Sonic and the rest of 1-A have returned to classes. Things seem to be normal until Deku unlocks a new power called Black Whip and a mysterious new foe appears seeking to destroy both Sonic and Eggman. Now it's up to Sonic, Shadow, and Silver to find out who Infinite is and stop his plans for good.

Infinite was the only villain Sonic couldn't defeat. He wasn't strong enough. But can Blaze defeat him with a new power Infinite has never seen before? The power of....love?

Shadow is finally living a somewhat peaceful life working for G.U.N. while living with his brother, Eclipse, and his new rival, Infinite. Shadow was enjoying his day until a familiar face showed up. What will come of these strange events? Just a story of one of my favorite Sonic ships. This is my first story, so please bare with me. Credits of the character to Sega, and credit to the artists of the pictures I've used thus far.

"Howdy! I am Maurice Feral, a little blue hedgewolf living my adventurous life on the outskirts of the darkest woods around. My closest people call me Sonic for my incredible speed I can reach while running. Heck, I'm able to outrun even some vampires! But, ahem, my abilities are not the main focus here. Let me tell you a truthful story, how my life and my general perspective on vampires completely changed ever since one specific, fateful night...." ⚠️Content warning:⚠️ - mild violence - mentions of characters' death - slight depiction of blood (definitely NOT gore, as I hate gore myself) - won't contain any 18+ stuff ~all the original characters belong to SEGA~

Characters and contents are a property of SEGA. I do not own anything. *PLS HIT THE VOTE BUTTON, IT REALLY HELPS ME OUT* After facing countless defeats at the hand of his arch nemesis, Doctor Eggman escapes what would've been a life of imprisonment and formulates a brand new scheme to reign over Mobius. And with him, is a brand new ally who posseses a gemstone of mysterious power. With this new dynamic duo brewing unbeknownst to Sonic, Eggman launches an all out assault on the planet and quickly claims his biggest victory to date. But once his control on the planet slips out of his hands, Eggman must turn to a brand new, never before seen villain, one that is fused with a gemstone whose power rivals even that of the Chaos Emeralds. His powers, his abilities...are infinite. Can Sonic and his friends stop this mysterious entity and put an end to Eggman's tyranny? Or will Mobius succumb to his overwhelming power?

After sixteen years, Mephiles has returned. Darker and more power hungry...after failing to defeat and kill Shadow, Sonic and the rest of the gang, he Is going to make sure he gets what he wants this time, by using the power of the chaos emeralds,He infects Shadow with a rabies like disease, called Muskiomal which makes Shadow a ruthless cannabalsitic killer at nightfall. Not only does Mephiles turn Shadow into a killer hedgehog, he forces him to take out revenge on not only on on Mobians but the entire universe as well. But only Amy Rose is aware of Shadow's illness after witnessing Shadow consuming human and Mobian remains behind a restaurant dumpster. Amy vows to keep Shadow's condition a secret not only for the safety of Sonic and the gang but for the universe...but if G.U.N finds out the ultimate life form and their top agent as dangerous... it could result in him being held captive, being detained against his will and experimented on as long as possible. Despite the life threatening situation, Shadow and Amy's connection grows closer and closer which ultimately leads to them having an affair which eventually leads them to being together, much to the disdain of not only Sonic, but to the entire group, unfortunately, it later becomes a weakness which will give Mephiles a possible one up against the team Will Amy and the rest of the crew find a cure for Shadow's condition or will he forever be Mephiles' murderous puppet? (All characters and images used belong to SEGA and their rightful owners.)

A tragedy in an alternate timeline has lead Sonic and Shadow to travel back in time at the expense of having to never met. Far from how the usual reality could've portrayed it, a reality where Dr. Eggman has stopped his evil schemes and the need for heroes is no longer necessary came into fruition. While the new beginning seemed utopian for humanity, a loophole from the former sacrifice has yet to reveal itself as the chaos they once harnessed continues to grow within themselves. --- "So Long Goodnight Book II" - new readers need not to read Book I in order to understand the story of "Defiance (SLG Book II)." --- All canon characters belong to SEGA. All original characters belong to their respective owners who will be mentioned in their given chapters. Book cover is originally illustrated by yours truly.