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Recap: Batman: The Animated Series E56 "Harley and Ivy" aka: Batman The Animated Series Harley And Ivy
"This could be the beginning of a beautiful friendship!"
After the Joker kicks Harley out, she meets Poison Ivy and they form an unlikely friendship.
Afraid of Needles: Harley; she hates to get shots, whining about it when Ivy gives her a vaccine to protect her from the toxic nature of the land around her house. Harley even lampshades the Trope, saying, "You'd think after workin' for Mistuh Jay I'd be used to a little pain."
Continuity Nod: Ivy and Harley rob the Gotham Peregrinators' Club, seen in some previous episodes.
Did They or Didn't They?: Poison Ivy and Harley Quinn work together when Harley is thrown out by The Joker. The first time this happened it cuts from them driving away to them wearing only their shirts and maybe panties talking about how much they hate men. Whenever they are seen hiding together, they only ever seem to have one bed.
Joker: Maybe I should let YOU run the gang! Maybe YOU are a better crook that the rest of us put together!
Made of Explodium: Ivy's entire neighborhood, by virtue of being built on top of a toxic waste dump full of flammable chemicals.
Never My Fault: As one might expect, the Joker blames everything that went wrong in the botched robbery at the beginning on Harley, even though a lot of it happened because of his own mistakes. (And she succeeded at helping them both evade capture.)
No Sell: The Joker tries to use his laughing gas on Poison Ivy after she and Harley upstage him. She lets out a brief laugh before revealing that she's laughing at Joker because his poison doesn't work on her, at which point she kicks him right where it counts.
So Much for Stealth: Harley slips into the museum, gracefully evades the laser grid, and starts carefully cutting into a diamond display case. Then the alarm gets set off by Ivy's intrusion elsewhere in the museum, so Harley just smashes, grabs, and runs.
Harley: Nice work, butterfingers! Why didn't you just turn on the Bat Signal while you were at it?
Stay in the Kitchen: Briefly touched upon when Harley Quinn and Poison Ivy team up, and grumble about the lack of respect they get from males. At one point they briefly get the upper hand on Batman and ask him if he is bothered by being beaten by "mere girls".
Batman: Man or woman, a sick mind is capable of anything. Poison Ivy: A very enlightened statement, Batman. We'll carve it on your headstone.