Thanks go to Tie-dyed Trickster and Em Phantom for reviewing.
Disclaimer: I don't own anything related to the TV show.
Box Guy
Jack and Maddie finished listening to Sam and Tucker's account of the last time they'd seen ghost Danny. His mom was walking around the portal, examining it.
"Mrs. Fenton, Danny was in the portal," Tucker pointed out.
"She's trying to see what you did with the settings," said Sam.
"But that wasn't where he disappeared from."
"No, it was why he disappeared," she argued.
"Shouldn't she be trying to find where he went to?"
"Look, maybe there's something that will help us figure out what happened in both places," Danny suggested.
"See, Sam? Danny thinks so!" announced Tucker.
"He also said that the controls are important!"
"Uh, hello?," Danny said. "Sam! Tucker!"
As the argument continued to escalate, Jack darted out of the room to refill his soda hat, and Maddie kept inspecting the portal. What they all failed to notice was the doors sliding open. A chubby man in overalls and a beanie stepped through. He had electric blue eyes that seemed to light up when he hollered a second later.
"I am the Box Guy!" he declared. The three ghosts were startled to see the just announced visitor in the lab.
"Jack!" Maddie called. "There's another human down here!" While Jack was hustling back to the lab, the Box Guy was searching the room.
Finally finding an old box, he bellowed, "Beware the box filled with . . . " the Box Guy stopped to check the label. "The box filled with beakers.
"Kids, take cover! Jack and I filled those beakers with highly destructive ectocarbon."
"Ectocarbon?" Danny asked. "I'm guessing that would be the human version of ectoplasm?"
"We're all gonna die!" Tucker screamed. Danny shoved him under a table.
"You should be safe here," he said. "I'm going to make sure he doesn't hurt anyone."
"Danny, ectocarbon's harmful to humans too!" warned Jack.
"Well, as I told Sam and Tucker, I'm half-ghost."
"Danny," Sam gasped. "You're going to risk what's left of you're life fighting the Box Guy?"
Danny transformed, getting an ectoblast ready to shoot at the Box Guy. "No! Remember how the roles of humans and ghosts are reversed between our worlds?" He released the blast. "Well, in my world, ghosts have powers!"
The Box Guy was shot back through the portal, with a final cry of "I am the Box Guy!", the last syllable drawn out as he fell.
"Besides," said Danny shrugging, and turning human. "Boxy there is my easiest foe to defeat."
In the main universe, Jack screwed in the final screw of the portal that would send ghost Danny home. "And . . . Done!" he reported. Danny stared at the portal.
"That is going to get me back?" he asked.
"Why not? It was a portal that got you here?" Sam reasoned.
"It's just so, small," he noted, directing his comment to the minuscule gateway. "And how do we know if it goes to the right dimension anyway?" Jack picked up a pair of tweezers and moved it toward Danny's head. Danny yelped and backed up.
"I just need one hair."
"Jack! You're scaring him," scolded Maddie. "Why don't you just ask him for one?" Jack's eyes lit up.
"Good idea! Danny, can I have one of your hairs?"
"Will it get me home?"
"Yes." Danny reached up and plucked out a single strand of hair. Jack grabbed it and put it in one of the machine's slots.
The portal flared to life. Danny ran to jump through, but Jack blocked him.
"Just a second, we want to make sure our son gets home too." he grunted. "Besides, you wouldn't leave without saying goodbye, would ya?"