You and Sora are on a construction building as Heartless appear!

Hammer Frame

Sora: Hey, isn't that- 

(Y/N): It's the King! 

You guys take out the Heartless and save the old Mickey, who just shakes your hands. And then another window appeared. 

Sora: What does this have? 

(Y/N): Let's see. 

You open it and see Maleficent scolding Pete! 

Maleficent: You absolute idiot! You've managed to fail at everything! And what's more...you foolishly thought you could take my place while I was away. Well, as of now, you're finished. Mark my words, there'll be no place for you when our time comes! Uselss imbecile. 

Pete: B-But Maleficent! I- 

She walked away. 

(Y/N): Hmm ... Maleficent sure was mad. 

Sora: I'll say. 

With Ruby and Weiss... 

Ruby: Hey, it feels good to do something together. 

Weiss: Yeah, it actually does. So, don't do something reckless like- 

They noticed they were in a small down and- 

Aeroplane

Ruby: HEARTLESS! 

Weiss: Oh boy! 

The two easily take out the Heartless with speed and Ice constructs of other Heartless! 

Ruby: YES! 

Weiss: Hmph. 

The two high-fived and kissed each other on the cheeks. 

Ruby: Oh! Look! 

Weiss: Another window! 

They pull the rope to see- 

Pete: Aw, for cryin' out loud...she didn't have to go and say that. Okay, I mighta messed up every now and then. But I'm a lot more things than useless... Why, when I was startin' out... Oh...I miss those good ol' days... What I wouldn't give to go back in time.

A door then appeared. 

Pete: What the? 

He walked in. 

Ruby: That was Pete! 

Weiss: What was he doing? 

Ruby: Something sinister, I bet. 

With Donald and Goofy... 

Goofy: THAT BUILDING IS ON FIRE A- 

Donald: LOOK! THE KING! 

They saw Mickey surrounded by-

Hot Rod

Donald and Goofy: WE'RE COMING! 

The two took out the car Heartless and were shaken by the young Mickey! 

Then they saw another window. 

Donald: What's that? 

Goofy: Let's take a look! 

They saw Pete and Maleficent. 

Maleficent: Fascinating... This appears to be a portal to the past!

Pete: Yeah, it was the strangest thing!

Maleficent: Stop gawking! And start thinking of a way we can use it to our advantage!

Pete: Okay.

Maleficent: Now, perhaps I could give you one more chance to redeem yourself.

Pete: Oh, thank you, thank you! You can count on me...! So, what do I do?

Maleficent: Patience, my dear...

Donald: So, that's how they found out! 

Goofy: We're in the past! 

Donald: Exactly! Maleficent must have told Pete to come here and that's how they found out about the Cornerstone! 

Goofy: Oh, this is not good at all! 

With Blake and Yang... 

The two were in a house with voids, and- 

Minute Bomb

Blake: Those Heartless look like- 

Yang: Don't worry Kitty, you got me by your side. 

Blake: Which I'm very grateful for. 

The two began to avoid the exploding Heartless and attack when necessary. 

Once they finish, they see a window. 

Blake: Well, let's see what's here. 

Yang pulled the chord and- 

Maleficent: On the other side of this portal, they're about to begin construction on that wretched castle. But until then, their treasured Cornerstone of Light lies unguarded, with all of its power still contained!

Pete: The Cornerstone...of Light?

Maleficent: Yes! That cursed sphere is the very thing that prevents us from entering the castle.

Pete: Oh.

Maleficent: You know what must be done?

Pete: Uh...

Maleficent: Go then. Time to prove your worth! And don't dare to fail me again!

Pete: You got it Maleficent! 

Yang: So the Pete we know is there! 

Blake: But it's not the Pete we saw. 

Yang: Yeah, Captain Pete seemed like a decent guy despite his temper. 

Blake: He's like you. 

Yang: Yeah, he's- HEY! 

Soon... 

You guys reunited and saw Pete knocking out Captain Pete, he had the Cornerstone of Light and was in the old boat! 

Everyone: PETE! 

Pete: HAHAHAHA! LATER LOSERS!! 

(Y/N): Not on our watch, buster! 

You shoot a beam from you Keyblade, stopping the boat, and then- 

Pete: NO! NO NO! THAT'S MY FUTURE ON THE- 

Donald cast magic, zapping Pete! 

Then you guys freed the Cornerstone! 

Pete: NOOOO!!! COME BACK HERE YOU RUNTS!!! 

He proceeded to give chase, though this only lead to- 

Yang: GET LOST MORON! 

Yang uppercutted Pete into the air. 

Pete: Ow, ow, ow, ow, ow! OH CRAPBASKETS! 

He summoned the door and escaped. 

Captain Pete: YEAH! AND STAY OUT! 

(Y/N): Sora! 

Sora: I know! 

You both sealed the door shut! 

Captain Pete: Would somebody tell me what's been goin' on here? Who was that creep, anyways?

Ruby: Oh, he's- 

Weiss: You dolt! Don't tell him that! 

Captain Pete: Oh, never mind about it. Sorry that I put you guys through that trouble. 

(Y/N): It's no biggie, Captain Pete. 

Blake: Okay, for the past version of him, he seems a lot nicer than his current version. 

Yang: Tell me about it. 

In the present... 

The thorns have disappeared! 

Merlin: By george! The lads have accomplished their mission.

You all returned through the door. 

Minnie: Welcome back! Because of your bravery, the castle is safe and protected again. Thank you so much for all you've done!

Chip 'n' Dale: Good work, you guys!

(Y/N): All in a day's work! 

Donald: Huh? 

Donald saw his girlfriend, Daisy. 

Donald: Daisy, I'm back!

Sora: Who's Daisy? 

Goofy: Oh, she's Donald's girlfriend. 

Yang: DONALD HAS A GIRLFRIEND?! GRUMPY DUCK DONALD?! 

Weiss: Honestly, with his temper and his voice, I never took him as someone who would have a girlfriend. 

Ruby: Oh come on. Donald's a jerk sometimes, but he's a great guy underneath. 

Daisy: Donald, you forgot about our date again! You'd better have a good excuse this time!

Donald: But Daisy...I...

Daisy: I know it's an important mission, but you could at least check in every once in a while.

Donald: Well ... I ... uh ... Guys, help me out here. 

(Y/N): Nope, sorry. 

Sora: You're on your own on this one. 

Donald then looked at the door to the past, but- 

Merlin: Donald. 

Daisy: What are you thinking in that head of yours Donald Duck? 

Donald: Well- 

Suddenly the Cornerstone of Light glows and you and Sora open yet another gate! 

(Y/N): Listen, Daisy, I'm (Y/N), and I'm a friend of Donald here. We really need to borrow your boyfriend for a bit longer. But don't worry, we'll return him when we're done. 

Donald: I'll be back soon, Daisy!

Daisy: Okay, but don't you dare leave me hanging, okay? 

Donald: Yes, ma'am! 

Ruby: Awww! You're just a big softie, aren't you. 

Donald: WHAT?! NO I'M NOT! SHUT UP! 

Everyone just laughed at that.