The gang are at the local laundromat cleaning their clothes, when Unikitty finds Batman's uniform mixed in with her clothes. Intoxicated by the coolness of it, Unikitty takes on the persona of Batman and begins to fight crime. When she accidentally causes Master Frown to step up his crime game, she will need the help of her friends, all dressed as Robin, to stop him.
Tropes:
- Adam Westing: Appropriately so. Besides reprising LEGO Batman, Will Arnett also voices Unikitty pretending to be LEGO Batman.BatKitty: Hiiii!!!
- Continuity Nod: Hawkodile's “Zoo” shirt from "Prank War" is among the items being washed at the laundromat.
- Crossover: Not just with the DC Universe but, as the end reveals, LEGO Batman as well.
- Easily Forgiven: LEGO Batman forgives Unikitty for taking his suit, as she used it for kicking villain butt.
- Girlish Pigtails: Brock as Harley Quinn has her red and blue pigtails.
- "Hell, Yes!" Moment: Master Frown and Brock are ecstatic when they think it's Batman facing them. They think they've finally hit the big leagues and are legit foes now.
- Hit Flash: During the big battle, as was to be expected.
- Hypocritical Humor: After getting defeated by the new Joker version of Master Frown, BatKitty asks why the others didn't help her. Hawkodile and Richard point out that they did and were refused.
- Improbable Weapon User: Among the gadgets BatKitty whips out is the Bat Senior Discount Card.Master Frown: Wait, for real?
- Ineffectual Loner: The others offer to help, but BatKitty insists that Batman works alone and goes after Master Frown alone. It goes poorly.
- Insistent Terminology: Hawkodile insists that Nightwing is not just one of the Robins.
- Instantly Proven Wrong: To justify keeping Batman’s suit and using it to fight crime, Unikitty points out how crime-riddled the Unikingdom is. Cut to the citizens raving about how safe it is and giving each other kisses.
- Naked People Are Funny: LEGO Batman reveals he's been naked for the entire episode and that that's why he most wanted his suit back.
- Nap-Inducing Speak: When Richard is droning on about his tips for doing laundry, Puppycorn immediately falls asleep.
- Take That!: Master Frown's incredulous reaction to BatKitty having a Bat Senior Discount Card is clearly a shot at the Bat Credit Card scene in Batman & Robin.
