Super Sonic charged after the Heavy King one more time, seeing him explode. He was satisfied now that the last of the Hard-Boiled Heavies were down. But once the robot exploded, he watched as the Phantom Ruby fell down. Right into Eggman's grasp. Super Sonic looked up, seeing Eggman rising up from his hiding spot, the mysterious ruby now back in his possession.
The two have been dueling within a purple void as a result of the Phantom Ruby's strange power to distort reality on a whim. Super Sonic knew that kind of power, like the Chaos Emeralds, Time Stones, or Chaos Rings, could be dangerous in his enemy's possession. The superpowered hedgehog decided that it was time to end this. Eggman slammed a fist on his Egg-Mobile, growing more desperate to destroy his hated nemesis once and for all.
It all started when Sonic and Tails tracked Eggman's Eggrobos on Angel Island upon discovering a strange energy source, their excavating somehow bringing the island back into the sea as a result of this new power, the so-called Phantom Ruby. Once they encountered the robots, the Phantom Ruby created a distortion that led to them being altered into the Hard-Boiled Heavies and ended up in Green Hill, where they discovered that Eggman was up to no good once again, and they gave chase right away.
Their adventure led them across locations old and new, sometimes while chasing Eggman and others as a result of Eggman harnessing the Phantom Ruby. It was then that they discovered his plan to chain Little Planet to Angel Island. Nothing stopped Sonic, Tails and Knuckles from stopping their foe and his new minions. And now they were at his new fortress, the Titanic Monarch, where the leader of the Hard-Boiled Heavies, the Heavy King, turned traitor and seeked to use the ruby for his purposes, having gained sentience, leading Sonic into a battle against him and Eggman using the power of the Chaos Emeralds.
Now here they were.
The arms of the floating hovercraft smacked themselves forward towards Super Sonic, who simply jumped from the floor and into a flying position, intending to do what he did best, trash Eggman's machines. And so, with one last dash, Super Sonic charged forward and crashed onto Eggman's machine. It exploded, leaving the doctor to fall and reality to fix itself in an instant.
However, the Phantom Ruby began to float, and enveloped Super Sonic into its pull, reverting him from his super form back to normal and leaving the Chaos Emeralds to scatter back to the Special Zone. Sonic was helpless as a purple vortex opened up behind him, dragging him inside to parts unknown.
From their spot on the edge of Angel Island, Tails and Knuckles watched the Titanic Monarch collapse as well as Little Planet getting unchained from Knuckles' floating island, the planet making its way to the sky to be free once more for its grand return to Never Lake in about a year without interruption. The two watched with concern, wondering where their blue friend had ended up.
However, Tails pointed to the sky with a smile, seeing Little Planet vanish in a bright light. And once it faded, he and Knuckles saw sparks, shaped like Sonic's head, and giving them his usual confident wink. They knew right then and there that whatever happened to Sonic, he was going to be just fine.
As for Sonic, he rolled through the vortex into the unknown. He didn't care where he ended up this time, but he had a theory as to where and when, and he knew he'd find a way back with some help. Luckily, judging by what he saw on the other side, he knew exactly what that help would be.
Himself. And he looked to be in trouble.
Without any further hesitation, Sonic jumped out of the rift, and even though he may be unsure as to what was happening, he was still ready for a new adventure.