Melissa grabbed her science equipment and got to work. While the others went back to the research facility Melissa had opted to hang back and run some tests on the jaguar. This as far as she was concerned was far easier than combing through video footage. Mostly because she had been raised with a love of science.

"Where did I put the syringe?" Melissa grumbled while digging through her case.

After finding her syringe she took a blood sample from the still comatose cat and worked from there. After running all her tests she wrote her findings in her journal.

...

As I suspected the Joker has infected animals with a rather potent Joker toxin. I dare say it's his worst yet. Luckily, under years of Ivy's guidance, I know how to reverse it. I also know how to make an antidote. So, the big kitty that's currently taking a nap will be returned to normal. Now, I'd better get to work on that antidote so that it will be ready when the others come back.

...

Meanwhile, Velma was searching through camera footage and research logs for clues. So far she had found that the joker had spread his toxin through the animals starting about three weeks ago. They knew this because the animals he had used had been tagged for research. He had them caged at a makeshift base. However, they had gotten loose and run off spreading the toxin to other animals. The research scientists had rounded up all the infected animals and brought them to the research lab but thus far the joker had not been found. This news worried Velma as she brought her findings to the gang.

"We've got to get back to the campsite," Benton declared.

They had to hurry for all they knew Melissa could be facing off with the joker at that very moment. With her unexpected plant powers who knew what kind of danger she might be in.

Shaggy honestly didn't see the point in worrying so much. Yes, Joker was bad news. Yes, he was a psychopath. Yes, he was dangerous but this was Melissa they were worried about. MELISSA. Shaggy knew from experience that she could handle herself. After all, he had ended up in the hospital because of her. She had also broken both of her uncle's arms, fractured his wrist cracked his ribs and gave him a nasty head wound. So, why were his friends so worried?

The answer to that question continued to elude Shaggy as they returned to the campsite where they were relieved to find Melissa was just fine. In fact, it looked like she had been expecting them. Shaggy gulped when he noticed the tray of needles next to her. Ever since he was a kid he had hated shots and it looked like Melissa was about to administer some.

"I've been waiting for you guys," she announced.

"Like, don't tell me we have to get a shot," Shaggy moaned.

"Well, do you wanna sucome to Joker toxin?" Melissa replied pointedly.

"Like, no thank you,"

"Then line up,"

Even Bandit had to get a shot much to his displeasure. Not that Melissa minded that much. Bandit was a little dog after all and he was quite easy to subdue. Shaggy, on the other hand, would not quit squirming.

"Shaggy would you please sit still?"

"I don't like needles,"

"Nah, I wouldn't know," Melissa snapped before collecting herself "Here, I'll count to three okay?"

"Okay,"

"One,"

Shaggy tensed.

"Three,"

Melissa proceeded to jab the needle into Shaggy's arm before he could jerk away again.

"You tricked me," he cried as Melissa put a bright green bandage over his arm.

"Oh, you poor unfortunate soul," Melissa quipped.

"Disney puns really?"

"Just let it go,"