Before we start, I need to answer Sonico171's request:
"back up the fanffics of Sonic and SpongeBob Heroes Unite please.
Actually, I'm not really sure if I revive the fanfic or not, but I say this once: NOt GONNA Happen! i know you want to see it revived it back but I'm not gonna do it, okay? So don't asking me again.
Chapter 11: Three Eras and One Dimension Collide
After defeating Dr. Robotnik and getting the second Chaos Emerald, he returned to White Space. Before he got there, many questions raised in his mind.
One, what are the Chaos Emeralds doing here in White Space? Coincidencially, they are used to stop a bigger threat, whether it was Eggman or another creature that tries to destroy the universe but he leaves it for a while.
Second, why is Robotnik laughing when he got captured by the Time Eater? The first time it happened, he got scared and pleads Sonic to help him. Now, he just laughs. Maybe he has a plan either to escape or control it but still, he don't get it.
And third, how did the Time Eater survived? He already tell it to Tails but he wonders what happened to him after he was defeated.
As these questions raised in his mind, he eventually got into White Space. He then walks away from the Boss Gate and took a glance at it. He still wonders what happened to Classic Eggman. He thinks that he may behind the return of Time Eater. It maybe true and thinks what to do right now….. Oh yeah! He got to meet with Modern Sonic and, just as predicted, he hears his modern counterpart yelling at him.
"Hey, there you are! I guess you are brave fighting against Eggman in there."
He turns around to face him, but he didn't expect something that surprises him. When he faced him, he was surprised to see another Sonic that has slightly dark blue fur and another one wearing a scarf and significantly taller than the rest of Sonics. Modern Sonic notices the curious look in his past self's face.
"If you got wondering why are there three Sonics now, take a look at your surroundings." Classic Sonic took this remark and take a look around him. He got his stare at the group, but wait! There are Modern Tails, Amy, Knuckles and their past selves, but another two of them!? One is that they are identical to their counterparts but slightly shorter. And one is that they are different: Tails is wearing a belt that holds his equipments, Amy is wearing a pink outfit and is taller, and Knuckles has more muscular build.
"Um, why is there many Tails, Amy, and Knuckles out there?"
"That's we really want to know. I don't think the two shorter Sonics, including you, are not my past selves." Classic Sonic turns around to see Boom Sonic saying his sentence. Modern Tails steps out of the group to explain everything what is going one here.
"Well, it's a lot of confusion out here but let me do the explaining."
"And also me too!" Classic Tails exclaimed.
"But there's one thing that is missing: where is Sticks?" Boom Tails said as he and Dreamcast Tails join the two foxes. Boom Sonic is looking at Classic Sonic from behind. It seems like there is someone here that is colored brown if you look in front of Classic Sonic.
"Sticks, stop hiding behind him. We already see you." Suspiciously, he looks behind to see a brown raccoon (he thinks) holding a boomerang. The 'raccoon' jumps out of her hiding spot.
"So I guess Sticks is a raccoon huh?" This makes Sticks annoyed being called a raccoon. The first time she got called by that, Modern Sonic did. But he explained to him that there is a friend of him that looks like her due to similar color and patterns.
"Hey! I'm not a raccoon ya hear me?! I'm a badger. A BADGER!" Sticks shout loudly as if she is going insane. She realizes her mistake when Classic Sonic looks at her with his head tilted at her behavior.
"You don't have to go ballistic like that. I'm just confused if you were one of my future self's friend."
"Sorry about that. It just that your fans are mistaking me as a Sonic Boom incarnation of a raccoon." Classic Sonic acknowledge it as he nodded.
"Okay, now that's covered up, let me explain what is going on here." Modern Tails and Classic Tails explained what is the Time Eater is, how they got here in the first place, and also how and why they have counterparts of them. The Classic, Dreamcast, and Modern Sonic are from their respective eras while the Sonic Boom cast are from a parallel dimension. They also explained how the Time Eater attempt to destroy the two Sonics.
"…..and as it turns out, the two Eggmen are the ones behind of all this….."
"…..and the two Sonics used the seven Chaos Emeralds to become Super Sonic and defeat the Time Eater along the two doctors." After explaining everything what has happened, the group excluding the Classic and Modern group understands this info. Dreamcast Tails asked Tails about something. "Wait, you said that the Time Eater was destroyed. But why is it existing?"
"That is the mystery we did not know yet. It maybe survived but that is not possible since its core was destroyed. Maybe there is another way it could have survived."
"Tails, sorry to bother but, what are Chaos Emeralds really?" Boom Tails asked. Classic Sonic walked towards the Tailses.
"Uhh, let's see, Chaos Emeralds are, um," He maybe having trouble discussing it. But for some reason, Boom Knuckles interrupt it.
"Are those emeralds shiny?" He said eagerly which annoys the other three Knuckles. They appreciate his muscle but they didn't like his clumsy and idiotic attitude. Surely, you just got some laughs from him, right?
"Does he likes shiny objects. I'm kinda annoyed my version is really idiotic." Modern Knuckles said to Boom Amy. "He is always at the time."
"Okay guys, I'll explain what are the Chaos Emeralds. These are-" Before he explain it, there is suddenly a rumble. Everybody are looking around if there are any enemies here.
"What was that rumble?" Dreamcast Amy asked. As soon as she said it, a purple portal opens and out came is none other than the Time Eater. Everybody becomes cautious as this creature finally comes out of the open.
Music: Dominus Tempus (Time Eater's Theme, Sonic Generations)
"Is that, the Time Eater?!" Classic Amy asked as she is shaking at the sight of it. She runs straight to Modern Amy and hid her face in fear. Amy comforts her as the Time Eater roars. As he looks around, he spotted Classic Sonic, his target. What!? His target is Classic Sonic? Just what is going on here?
The Time Eater lets out a roar one more time before he started flying over the White Space and ludges his hands towards Classic Sonic. He didn't see it and was about to get snatched when Modern Sonic boost towards the hand to keep it from capturing. Classic Sonic took notice of what was going on and, to his surprise, noticed the Time Eater staring at him menacingly.
"Be careful! You don't want to get caught by that beast, do you?" The past Sonic nodded as the Time Eater began to fly around the White Space this time, entering the portal and coming out at the other side. The heroes are careful where is the Time Eater heading to. However, there is silence at first and, thinking its gone, lower their attack stance
However, it appeared again and at full speed, charge towards Classic Sonic. Because he thinks that it's gone, he did not notice it. Just as he was about to snatch him, he got suddenly repelled from him, Everybody noticed it roaring and putting it hands on its face as it then leaves the group. Everybody is confused of how and why it did not captured him. However, Boom Sonic noticed something holding in his hand. It looks like a blue gem and quickly realized it was a Chaos Emerald.
Stop music here.
"Hey, is that a Chaos Emerald?" Upon hearing it, the Sonic Boom cast surround him as he took out another Chaos Emerald, this time its red.
"Hey there bud, how did you get the Chaos Emeralds?" Modern Sonic asked.
"Well, I get it after defeating the two Metal Sonics and after I defeat Eggman."
"Wait, you battle Metal Sonic?" Boom Sonic asked.
"Yeah, one is from my time and another one from, in my thought, Modern Sonic's time." After saying this, he noticed that Modern Sonic sped off, likely to find the Time Eater, rescue more friends and restore time to normal. The other three Sonics follow in their quest to restore time.