Everybody gets together at the IS Academy. That would include the groups with Sonic, Kirito, Ichika, Ruby, and Tatsuya. Once they do, some random music hits up and Sonic, Tails, Knuckles, Mighty, and Ray sing.
Sonic, Tails, and Knuckles singing: Here's the story! Of a guy named Sonic! Who is the fastest hedgehog who has ever lived! He's got a team of super awesome people!
Knuckles singing: And Knuckles for the win!
The hedgehog kicks the echidna to a wall.
Sonic: Shut up, Knuckles!
Mighty and Ray singing: Here's the story! Of a guy named Kirito! He is the greatest anime swordsman of all! Then came a team of huntsman and IS pilots! And friends from another dimension!
Team Sonic singing: And now he gang is up and all together! To fight an army that packs much more than a punch! We've made some friends that we will fight alongside! That's the way we all became the AniBunch!
Ruby: WOOO!
Team Sonic singing: The AniBunch! The AniBunch! That's the waaaaay we became the AniBunch!
Knuckles: And Knuckles!
Sonic kicks him to a wall again. Then, the song ends and everybody claps their hands.
Asuna: That was great!
Jaune: Pretty great parody!
Erika: Yeah! That was cool!
Cinder: I always loved that show.
Chifuyu: Alright everyone. Let's get back on track. We will be set for deployment very soon. Make sure you're all prepared before we set off.
Kirito: ...
Asuna: Is everything okay, Kirito?
Kirito: Everything's fine. Just...
Asuna: We're all gonna be okay. We're not sure what we're up against, but it'll be okay.
Kirito: Right.
Intercom: Warning! Warning! Unidentified airship approaching!
Miyuki: An airship? Now at a time like this?!
Miss Yamada opens up the computer to discover an airship with a mask on it, and once they all see it, Cinder gasps.
Cinder: The army?! Here?!
Tails: Did they find out about our plan?!
Sonic: They must have. We need to get rid of them now.
Everyone: Right!
Chifuyu: Ichika. You and the others get ready to deploy.
Ichika: Right!
Everybody heads outside to fight against a hoard of shadowy monsters and robots.
Tatenashi: We're going to head to that airship! You guys stay down here and hold off the...
She gets interrupted when Robotnik flies down in his Egg Mobile. And the Administrator follows.
Dr. Robotnik: Hey there, you blue rat! I've practiced my hedgehog call! GOGOGOGOGOGOGOGOGO!
Sonic: So let me guess! Is this your new army?!
Dr. Robotnik: That's right! Hey Cinder! Look! I got a new friend here! And she's incredibly powerful let me tell you! I think she's a level 1,000 boss.
Cinder: Whatever.
Administrator: Nice to see you again hedgehog and irregular boy.
Ichika: Is that the Administrator you guys were talking about?
Sonic: Yep. That's her.
Lisbeth: Hey Eggman! If you think you're gonna win, you're in for a reckoning! We'll beat you and that army to bits, Mr. Baldy McNosehair!
Silica: Liz is right! You're a big mean and selfish person!
Dr. Robotnik: Shut up, brats! Sonic! I'm going to beat you and all your friends to the ground!
Administrator: You mean, "we?"
Dr. Robotnik: Let's just get to the destroying already. Ancient Minister! Get the R.O.B. squad out here now.
Someone in a green robe wearing a hat shows up, along with an army of robots that look exactly alike and carrying some big device. They approach the academy and activate the device. As soon as they do, a timer starts counting down on it.
Mighty: Is that a bomb?!
Dr. Robotnik: This is no ordinary bomb! No sir!
Tails: That must be the subspace bomb mentioned in those files!
Sonic: Tails! Go disarm it!
Tails: Right!
Administrator: Unfortunately, it won't be that easy. It was built to be impossible to disarm. It will explode once you attempt to do so. Even with a jamming device or magic, it will not work.
Asuna: No way!
Ray: What do we do?!
The male IS pilot picks up the bomb with massive strength.
Ichika: Then let's get rid of it!
Kanzashi: Ichika! What are you doing?!
Ichika: Returning to sender!
Laura: Perfect plan!
Yamada: Everyone, listen up! We have unidentified starfighters attempting to engage the airship!
Tatsuya: Starfighters? Who are they?
The two starfighters engage the airship with a mask.
Fox: Let's keep them occupied, Falco! We need to lure them away!
Falco: Roger that!
The fox gets a transmission from Chifuyu.
Chifuyu: Unknown fighters! Identify yourselves!
Fox: This is Fox McCloud! Leader of Star Fox! We received reports of an army attempting interdimensional bombings!
Chifuyu: So you know about the Subspace Army too?
Fox: We do. They seemed to have gathered up a bunch of allies, because our enemy, Star Wolf is part of them too. We also know that they have several targets in this world and in a few different dimensions, that includes this place.
Chifuyu: Well, a subspace bomb has been activated here, and one of ours is trying to send it back at the airship. You guys might wanna stay away from the blast zone.
Fox: Roger that! Falco! Let's get away!
Falco: You got it!
Ichika flies up to the airship with the big bomb in hand.
Ichika: Almost there!
The airships defense fire attempts to shoot at him.
Tatenashi: Be careful, Ichika!
Ichika: Just a little more!
Suddenly, a blast hits him, making him drop the bomb into the water, lose all his shield energy, and hit the ground.
Everyone: Ichika!
Sonic: Ichika! Are you okay?!
The blast has of course come from Metal Sonic.
Ichika: I'm fine. But the bomb...
Dr. Robotnik: The bomb is set to explode in 50 seconds. You have no time to grab it. And don't think the water is gonna save the academy. Come on, Administrator. Let's get out of here.
Administrator: With pleasure.
They both head back to the airship, and Metal Sonic heads down and snatches the zero-point energy, tennis ball, size change gun from Kanzashi and leaves.
Dr. Robotnik: Great job, Metal Sonic. We got back what they stole from us. Now give me that.
Metal Sonic hands it to the doctor, and he shoots it down at a random person, and that random person is Sinon. Once it hits her, her form changes back to her real world self with black hair, glasses, and casual clothing, and her Hecate sniper rifle gets bigger and bigger.
Shino: What's happening to me?
Miyuki: She's shrinking?
She stops once she reaches 1 inch tall.
Shino: What is...
Yamada: There's no time! Grab her and get out of there, now!
Everyone: Right!
Spiegel picks up Hecate and the tiny sniper, and everybody evacuates. Once they were out, the bomb explodes with a growing purple orb, and the IS Academy gets pulled inside it. What used to be the academy, now ends up being a giant purple orb.