(Y/N and Batman are seen at Batcave as Batman builds a more advanced Optimus Prime Suit for Y/N. Then Batgirl comes in.)

Batgirl: Hi, Batman. Hi, Y/N.

Y/N: How do you know my name?

Batgirl: Kara told me about you. And you gotta admit, Batman is the best inventor everyone has ever seen. He created his very first Batsuit himself. The same goes for his gadgets, his hideout...

Batman: Y/N has heard enough, Barbara.

Batgirl: Sorry, Batman. I am much of your fan. You know that, don't you?

Batman: (sighs) I do.

(One minute later)

Batman: Done.

(Then the new Optimus Prime suit is shown. Y/N and Batgirl get amazed by seeing the suit.)

Y/N: Wow.

Batgirl: That's amazing. Sure, all Batman's inventions are amazing, but this one... Batman surpassed himself.

Y/N: I'll try this on.

(Then Y/N tries the new Optimus Prime Suit.)

Y/N: I admit, it fits better than the last.

Batman: Now it's time for some tests!

(Unfortunately, the Bat-Comupter starts beeping.)

Y/N: Problems, right?

(Then a video of The Joker wreaking havoc in Gotham.)

Batman: It looks like The Joker is causing some chaos.

Y/N: Okay, Let's get this Joker.

Batgirl: That's the spirit!

(In Gotham, Batman is seen piloting his Batmobile as Y/N uses his suit.)

Y/N: Time to see what this cutie can do.

(Then Y/N turns his suit into a truck)

Y/N: WOW! Just like the Original Optimus Prime can do!

(Then the trio arrives at The Joker's Fun House.)

Batman: This must be where he's hiding!

(Then Y/N sees Harley Quinn.)

Y/N: Batman, look!

Batgirl: Harley Quinn?

(Then the villainess notices the heroic trio.)

Harley Quinn: Why, if it isn't the Batsies and their new sidekick. What can this robot do, huh? HUH?

(Then Y/N uses his new suit's Ion Cannon to shoot Harley Quinn down. Then Batman goes to check on Harley Quinn.)

Batman: She's fine. (to Y/N) Next time, use low firepower!

Y/N: Sorry.

Batgirl: Now for The Joker!

(Then the trio goes further and see The Joker's goons.)

J. Goon 1: It's Batman!

J. Goon 2: And Batgirl!

(The Joker's goons try to shoot the duo down, but Y/N uses his new suit's shield to defend them. Then Batman throws some smoke bombs at the enemies, causing them to not be able to see the heroic trio who overwhelms them. Then they proceed even further and see a giant robot.)

Y/N: Uh-Oh... now that's trouble...

Batman: Try to use flight and cut its head with your wrist blade!

(Y/N then does so, exactly as Batman instructed him. The robots falls down after Y/N cuts its head, much for Batgirl's amazement)

Batgirl: That worked!

Batman: They don't call me the world's best detective for nothing.

Y/N: (lands in, then points at The Joker) There he is!

(Then the trio approaches The Joker.)

Batman: You're surrounded, Joker! Surrender!

The Joker: Uh uh uh! I still got some nasty surprises for you and your sidekicks.

Y/N: Technically, I'm not a sidekick.

The Joker: Anyway... come and get me!

(Then The Joker runs away as the trio chases him. Then The Joker goes to a roller coaster.)

The Joker: This will be your last trail, Batsy. (to Harley Quinn) If you do the honors...

Harley Quinn: Of course, Mister J.

(Then Harley Quinn turns on the roller coaster and runs away. Y/N uses transforms his suit into a truck again while Batman goes at the other roller coaser and the chase starts. Batman shoots The Joker's baloons with his batarangs. Y/N reaches The Joker, then turns his suit back and fights The Joker by himself. The Joker tries to hit him with his knife, but the knife is smashed.)

Y/N: My turn!

(Y/N then punches The Joker in the face before throwing him down and stepping on his back.)

(Some minutes later, The Joker and Harley Quinn are taken back to Arkham.)

Batgirl: Oh yeah. We did it!

Y/N: I'm impressed you could defeat Harley Quinn by yourself, Barbara.

Batgirl: I have been training lately.

Y/N: Good to know. Now come on, we need to see if the Professor found something about those invaders.

(Y/N and Batgirl then leave.)

(Y/N's new suit got new features. Now he is ready for anyone.)