Meanwhile back in Gotham, Batman and Robin were about to be plunged to their death in a vat of thinner with their enemies, the Joker, the Penguin and the Terrible Trio watching.

"Well Batman," the Joker cackled "Looks like I've finally won."

"Oh Mr. J," Harley sighed lovingly "You are so modest."

Just when the Dynamic Duo was about to be dissolved, something came crashing into the wall.

"What the?" Poison Ivy turned around.

"What's going on here?" asked the Penguin.

The Dymanic Duo and the villains turned around and saw our heroes; Batgirl, Ace, BF, Scooby, Scrappy and Elmo.

"Get away from them you clown!" said Batgirl.

"Batman!" said Robin "It's Batgirl!"

"And Ace!" Batman added.

"And I brought an old friend of yours." said Batgirl.

"Rello, Roker!" said Scooby.

"Well, well," said the Joker "If it isn't Scooby-Doo. It's been quite a while."

"Boy," Poison Ivy folded her arms "Batgirl is here too, looks like it's four for the price of one!"

"I'm gonna say this once and one time only Joker!" said Batgirl "Let them go!"

"Yeah" Scrappy growled "Or you'll have to deal with me and my Uncle Scooby! We'll splat ya!"

"Awww" Harley looked lovingly at Scrappy "A cute little puppy. Mr. J, can I have him?"

"No!" the Joker slapped Harley across the face. "You cannot have that puppy!"

"Please pudding?" Harley picked up Scrappy.

"What're you doing?" Scrappy demanded "Put me down!"

"I'm gonna hug him!" Harley hugged Scrappy.

"UGH!" Scrappy grunted "Let me go!"

"And kiss him," Harley started kissing Scrappy.

"You can't kiss me!" Scrappy kept getting kissed "I'm married."

"And groom him" Harley kept hugging and kissing Scrappy "And buy him fancy collars, and take him for walks, and be his momma, and-"

The Joker slapped Harley again "No you're not you idiot!"

Harley accidentally dropped Scrappy back onto the ground.

"You okay Scrappy?" asked Dynomutt.

"Sure," Scrappy picked himself up "But I'm covered in black kiss marks."

"What's the big idea, Mr. J!" Harley rubbed her cheek.

"That's Scooby's nephew, Scrimpy!" said the Joker.

"It's SCRAPPY you clown!" Scrappy barked.

"Whatever" said the Joker.

"Wait a second," said Catwoman "These guys have hearts! Let's suck them out and then kill them!"

"Yes," said the Penguin "It will be easy since Scooby doesn't his owner Shaggy Rogers!"

"Yes, Scooby-Doo, where is Shaggy?" the Joker chuckled "Has he fired his sidekick?"

"Hey!" said Scooby "I'll have you know that Shaggy and I are equal partners! I'm no sidekick!"

"But that doesn't matter!" said Batgirl "We're here to stop you guys!"

"And there's nothing you can do to stop us!" Dynomutt added.

"Bring it on baby!" Catwoman struck a battle pose.

"Maybe this time, I'll finally kill you Batgirl!" Poison Ivy added. "I'll be taking that off my Christmas list!"

"We'll see about that Ivy!" Batgirl spat back.

"But don't worry Scooby honey," Harley put her hands on her hips "I've got some little friends for you to play with!"

Harley out her fingers in her mouth and whistled for someone.

"BABIES!" She shouted.

Two hyenas came right out of the shadows. They were growling right at Scooby and the dogs.

"Rikes!" gasped Scooby

"Get away from them!" Blue Falcon said sternly.

"The Blue Falcon" Catwoman said seductively "Have I been dying to meet you. You're so good looking and strong. Too bad it can't work out!"

Catwoman kicked Blue Falcon and sent him flying across the lair.

"Rikes!" gasped Scooby "You okay, Blue Falcon!"

"Yeah!" said Blue Falcon, flashing thumbs up.

"Are you going to let her do that to ya, BF?" asked Dynomutt.

"She's a woman, Dog Wonder!" said Blue Falcon "I can't hit a woman."

"Oh." said Dynomutt "Right! We got a code of honor!"

"BF" said Batgirl "I'll take care of the girls! You take care of the baddies and the dogs will save the Dynamic Duo."

"I will be the judge of that!" Harley snapped her fingers "Oh babies!"

Harley's hyenas, Bud and Lou were drooling and growling right at the dogs.

"Boys," Harley said sweetly to her hyenas "Do mommy a favor and attack those meanie weenie doggies."

Bud and Lou both nodded.

"Now make mommy proud!" Harley told Bud and Lou "ATTACK!"

Bud and Lou charged right at Scooby and the other dogs and were about to attack.

"Quick!" Ace told the other dogs "We've gotta make a run for it!"

"Ruff!" Elmo followed Ace.

"Come on you mangy hyenas!" Scrappy raised his fists "You don't stand a chance against me, right Uncle Scooby?"

Scooby grabbed Scrappy and they ran away from the hyenas, which were still chasing them.

While the hyenas were chasing the dogs, Batgirl was battling the villainess'. BF however, had to rescue Batman and Robin. But the Joker and Penguin were in the way.

"Looks like you're doomed Falcon!" the Joker pointed his gun at BF.

"Yes," the Penguin showed his umbrella "You'll never save our enemies or their hearts either!"

"And you forget" said the Joker "There's only two of us and one of you! And your allies are too occupied to save you! Hasta la bye-bye!"

The Joker was about to pull the trigger on Blue Falcon.

"I've gotta stop him" he thought "But how?

Blue Falcon saw the drainage valve for the vat and saw his utility belt. He got an idea. He threw his BF boomerang at the vat's lever and it hit the lever, which caused the vat to drain of all the thinner.

"Holy anchovies" Robin exclaimed "The thinner! It's draining!"

"What?!" the Joker gasped "No! Well it doesn't matter anyways. Cause we have the hearts!"

Just then, Batman and Robin broke right out of the cage.

"You forget Joker!" said Batman "You've still got us to deal with!"

"Give it up clown!" Robin pointed his finger at the Joker "You've lost!"

"You're coming with us" said Batman.

"That's what you think!" the Joker took out a deck of cards and threw them right at the superheroes.

But these weren't ordinary cards; they were really shuriken playing cards. Our heroes ducked and the cards stuck to the wall.

"Close, playing cards" the Joker hissed.

"Looks like you're up against us!" said the Joker.

"We won't go down without a fight!" said Blue Falcon.

"So be prepared Joker!" Batman added.

"You too Penguin" Robin added.

The Penguin opened up his umbrella.

"This should be fun." the Penguin chuckled.

Meanwhile, the dogs had been running from the hyenas. They were running from different doors when they hid in a corner.

"This should be a good place" said Dynomutt.

"But not for long" said Ace "I don't think you've noticed this but hyenas have a very good sense of smell. They can smell fear."

"How can you tell?" Scooby shivered.

Elmo whimpered and shook with fear.

"Lucky guess" Ace rolled his eyes.

"Can you take them down Ace?" asked Dynomutt.

"Probably," said Ace "But I'll need your help Dog Wonder."

"You can count on me!" Dynomutt saluted "Dynomutt, Dog Wonder is on the beat!"

"In the meantime, I'll need you three to get Batman and Robin's hearts back." Ace told Scooby, Scrappy and Elmo "Are you up for it?"

"We sure are!" Scrappy said "We're not afraid of anything, right Uncle Scooby?"

Scooby and Elmo were whimpering and quivering with fear.

"Come on, Uncle Scooby!" said Scrappy "I am still the king and I am ordering you to man up!"

"Rokay" Scooby gulped.

"And you too Elmo!" Scrappy pointed to the still whimpering Elmo.

Elmo whimpered.

"Elmo!" Scrappy slapped Elmo a few times "Quit being a stupid baby! Don't you want to make your master proud?"

Elmo whimpered and nodded his head.

"And do you want to show that cat, Boo what you're made of?" Scrappy continued.

"Ruff!" Elmo barked.

"Then come on!" Scrappy said "Let's go get those hearts back!"

Elmo stood on his hind legs and saluted.

"Ruff!" He barked.

"Alright" said Ace "Ready?"

"Ready!" Everyone else said at the same time.

"Then let's go!" Ace said boldly.

Scooby, Ace and the other dogs split up to stop the hyenas and get Batman and Robin's hearts back.

Author's Note:

Looks like the Joker knows no jest! While the superheroes are battling, the dogs have the hyenas to deal with and have to get Batman and Robin's hearts back before it's too late. Can they do it? Stay tuned!