The First & Last Annual Justice League Halloween Bash

by TwinEnigma

Standard Disclaimer - I do not own Young Justice or any of the characters therein. I do not do this for profit, but rather for fun and skills building.

NB: done as a fill for the YJ-anon-meme, for a prompt where everyone turns into their costumes on Halloween. De-anoning because I admitted it's me.

Warnings: hilarity ensues.

1.

"Well, this isn't good," Barry said.

Wally rather thought that was a complete understatement on his uncle's part.

"I think everyone's become their costumes," Barry paused, turning his head to watch what was quite likely the Green Lantern John Stewart in some of the most psychedelic clothes since Hendrix walked the earth. "I'm going to hazard a guess and say we're dealing with magic."

Which would explain everything, even the fact that Wally's hands and body were currently bigger than he remembered and his uncle was looking rather short and, actually, much more of a teenager than he did at the moment. Except, Wally mulishly thought, magic was not real, so this had to have a much more mundane explanation. Like a body switching ray, or an age-gun, or mass hypnosis – all the things of real, if a little mad, science.

"Je ne comprends pas," Artemis said, from beside them. "Qui êtes-vous?"

Of course, she'd gone as some French aristocrat and was suddenly now able to speak fluent French and only that. But at least she was safely accounted for, which was more than Wally could say for the rest of his teammates, who were lost, somewhere, in the chaos that had suddenly become the First (and possibly last) Justice League Halloween Bash.

Artemis suddenly screamed and dove behind Wally as Superman, dressed in tattered clothes and wearing chains, floated up through the wall next to them with a completely bewildered expression. The Man of Steel turned his very startled eyes to Wally and said, "Barry, I think I'm dead. I mean, really dead."

Wally ignored Artemis's terrified French and sighed, "Sorry, wrong speedster. My uncle's over there. Age-switch, you know how it goes."

Barry waved to the perplexed Kryptonian. "He's in denial. Just go with it, Supes."

Superman nodded absently, "Right. So any idea what's going on?"

"You know, the usual Friday shenanigans," Barry shrugged, "Everyone suddenly turning into their costumes at our first holiday party with the kids, supervillians likely to be involved as part of some distraction or crazy revenge scheme, and we're probably the only sane three left in the building."

"Wonderful," Superman sighed.

"Make that the only sane four," a familiar voice said from next to them. Were it a little more growly, Wally would have said it belonged to Batman, but the owner was in fact an unrecognizable man in a grey coat and cape, grey mask and fedora. The man bowed, doffing his hat, and added, "The Grey Ghost, at your service."

"The who?" Wally asked, staring.

"TV show. Before your time," Superman said.

"I can see we're in a bit of a pickle," the Grey Ghost turned in a strange way, like he was playing to a camera. "I suggest we attempt to establish some order and search for clues. The chaos is likely obscuring some greater nefariousness."

"Right," Wally said, nodding slowly, and then leaned over to whisper to his uncle, "Did he always talk like that?"

"You have no idea," Barry whispered back, grinning with ill-concealed glee. "Just wait, I'll bet he does one of his famous Ghost Deductions."

Wally rolled his eyes. Somehow, he was not too impressed with the idea of a nostalgia trip regarding a show he'd never seen, but apparently was the stuff of awesome for the League's generation. That and it always sucked when he didn't get the joke. "Okay, well, I'm going to see if I can find my friends before they hurt themselves."

"A wise decision, chum," the Grey Ghost said, clapping Wally on the shoulder. "But be on your guard. I sense a fowl plot afoot."

At the strange emphasis on the word, Barry and Superman both exchanged a look and neither could quite hide their grins, though Superman appeared to be desperately trying.

"Riiiight," Wally said, turning and starting to walk away. "Come on, Artemis."

"Chevalier! Chevalier! Ne me quitte pas!" she shouted, hurrying after him as fast as her skirts would allow.

AN: In Batman: TAS, it was revealed that Batman has been a huge fan of the show "The Grey Ghost" (an affectionate reference to the original Batman serials with Adam West) since he was a little boy. The Grey Ghost and his actor were played by Adam West in that episode. So basically, Batman in this chapter is basically being Adam West's Batman.