Author Note: Krypto the Superdog was a great show, and now I have the chance to write about it. I noticed that while they have made multiple episodes about the hyenas, they haven't done anything with the Joker fish from the classic Batman animated episode. As such, I have created Jackie, a female OC named after Jack Nicholson.

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In 1993, there came about a plot in Gotham City created by the Joker. One that would have the populace under its sway with mutated fish that bore the white face and red lips of the Clown Prince of Crime himself.

Unfortunately, this plan did not come to fruition, as Batman thwarted the Joker's reign of terror as he always does.

But what became of the venom?

Two months after the event, just to experiment if it was still dangerous, a crack team of scientists at S.T.A.R. Labs had obtained some of the venom, dropping a couple of drops in the fishbowl of some week-old goldfish.

They did not expect what would happen next...

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Late at night when the staff was closing up the labs, something happened.

Over at the experimental lab fish tanks, a lock was heard opening.

One of the unfortunate people there, a ginger by the name of Olsen, was photographing the animals for the Daily Planet's animal rights column. He flinched when he the door open and a paper clip that was bent in the shape of a key landed on the ground.

Olsen moved closer, trying to investigate...

Suddenly, a small goldfish popped her head out from within the tank. This was no pet store goldfish, as she was white, with green fins and huge red lips. For some reason, she also wore a tiny purple sailor's hat. The fish took one look at the kid and BIT his nose!

"DAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGH!!" Olson exclaimed, flailing about, knocking over scientific equipment and setting off the alarm.

"OLSON, WHAT'S GOIN' ON DOWN THERE?!" The lead S.T.A.R. Labs scientist hollered.

"Uhh.." Olson stuttered.

Then, the little goldfish eventually let go of Olson's nose, standing on two legs.

"...you got a real nasty flavor, kid!" The goldfish spoke.

Olson immediately fainted as the tiny fish walked away.