"Tails!" Young Classic Sonic yelled out into the misty and rainy night. He doesn't know where he is, but that wasn't important to him. He needs to find his friends.

"Tails! Knuckles! Amy! Where are you?!"

Classic Sonic knows that this isn't Modern Universe, so looking for his older self isn't the way, so what dimension is this?

"Guys?!" He yelled again. The rain have picked up as the mist made things even more unclear. But he could see, standing tall in front of him, was himself, but older. He looked like his older self, but at the same time...older? Because of him suddenly appearing, Classic Sonic got quite a big shock and stepped back. With a stern voice, this new Sonic spoke.
"Your friends cannot be with you any longer."

Hearing those words come from this Sonic, Classic Sonic's ears dropped. He hung his head low as tears threatened to fall down his face. The older Sonic knew he was being too stern, but he can't risk coming close with himself. Who knows what could happen?
"Come now." He said, turning around to walk back home. "You'll be safer with me."
Reluctant, Classic Sonic still followed.

They walked through the forest, through the roaring rain, until they reached a shack on the beach. Classic Sonic walked in, his head still low. Glancing up at his older self, he saw a stern look on his face. Going in, he laid down on the string-tied hammock and closed his eyes, dreaming about his friends.

Outside, Sonic watched his younger self sleep. Fiddling with his brown scarf, he turned away and was greeted by a familiar young fox.
"Tails?" He said, moving his hands away from his scarf.
"I'm sorry I kind of cause this Sonic..."  Tails spoke, his voice lowered. He looked into the shack, watching the young hedgehog sleep. "So young...and he lost all his friends too... I'm sorry."
Sonic felt guilt and sorrow for Classic, lowering his head, closing his eyes. Tails felt the same, for it was his invention that had caused this.
"Well, if you need any help, I'm always open..." Tails turned to leave, but Sonic suddenly called him back.
"Wait!" Sonic shouted, having an idea. "I could use your help."
Tails turned back around, facing his blue friend. Knowing what he was doing may be more hurtful than helpful, Sonic told Tails anyways.
"Find a mother suitable to raise him"
"Huh?" Tails thought for a moment. "Well, I do know someone on the other side of island and I'll be able to contact her once I clear out the junked tele-lines in my workshop." He casts a glance at Sonic and nervously, he said, "Perhaps you could...?" 

"Me?!" Sonic gasped at his friend's request. "I'm sorry Tails, but I can't get too close with him! Who knows what will happen?" 
"I mean, he is you, so it couldn't hurt. Right?" Tails answered, fidgeting his fingers. Sonic thought for a moment, rolling his eyes up and looked at the sky. Then, he sighed in defeat. 
"Until you can contact her." 

"Oh! Good!" Tails exclaimed and turned to leave. But before he left, he mused. "Because who's the best to take care of yourself? Yourself, of course!" And he left back to his workshop in town. 

Sonic stepped into his shack, looming his taller shadow over his young sleeping self. Silently, he stepped aside and sat down on the bean-bag. He sighed, dropping down his shoulders and relaxed himself. He stared out of the window, watching the raindrops fall to the ground. But before he went to sleep, Sonic looked back at Classic Sonic, his back faced to him. Then, he laid down and went to the dream-realm. And when he did so, young Classic Sonic took one little peek before closing his eyes and went to sleep.